/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:58:20,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:58:20,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:58:20,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:58:20,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:58:20,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:58:20,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:58:20,862 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 [2021-08-21 12:58:20,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:58:20,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:58:20,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:58:20,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:58:20,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:58:20,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:58:20,885 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:58:20,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:58:20,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:58:20,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:58:20,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:58:20,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:58:20,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:58:20,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:58:20,888 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:58:20,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:58:20,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:58:21,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:58:21,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:58:21,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:58:21,140 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:58:21,142 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:58:21,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-08-21 12:58:21,479 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-08-21 12:58:21,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:58:21,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:58:21,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:58:21,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:58:21,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:58:21,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:58:21,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:58:21,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:58:21,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:58:21,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:58:21,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:58:21,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:58:21,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:58:21,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/1) ... [2021-08-21 12:58:21,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:58:21,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:21,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:58:21,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:58:21,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:58:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:58:21,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:58:21,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:58:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:58:21,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:58:21,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:58:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:58:21,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:58:21,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:58:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:58:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:58:21,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:58:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:58:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:58:21,890 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:58:22,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:58:22,043 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:58:22,044 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:58:22 BoogieIcfgContainer [2021-08-21 12:58:22,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:58:22,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:58:22,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:58:22,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:58:22,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:58:21" (1/2) ... [2021-08-21 12:58:22,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dde92 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:58:22, skipping insertion in model container [2021-08-21 12:58:22,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:58:22" (2/2) ... [2021-08-21 12:58:22,049 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-08-21 12:58:22,052 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:58:22,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:58:22,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:58:22,052 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:58:22,083 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:58:22,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:58:22,159 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:58:22,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:58:22,170 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-08-21 12:58:22,226 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:58:22,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:22,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:22,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash -315677691, now seen corresponding path program 1 times [2021-08-21 12:58:22,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:22,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913432008] [2021-08-21 12:58:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:22,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:22,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:22,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913432008] [2021-08-21 12:58:22,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913432008] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:58:22,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:58:22,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:58:22,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018589807] [2021-08-21 12:58:22,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:58:22,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:58:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:58:22,417 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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) [2021-08-21 12:58:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:22,468 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-08-21 12:58:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:58:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:58:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:22,493 INFO L225 Difference]: With dead ends: 691 [2021-08-21 12:58:22,493 INFO L226 Difference]: Without dead ends: 691 [2021-08-21 12:58:22,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:58:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-21 12:58:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-08-21 12:58:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-08-21 12:58:22,573 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-08-21 12:58:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:22,574 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-08-21 12:58:22,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-08-21 12:58:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:58:22,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:22,582 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:22,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:58:22,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1754302367, now seen corresponding path program 1 times [2021-08-21 12:58:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:22,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119756144] [2021-08-21 12:58:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:22,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:22,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:22,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119756144] [2021-08-21 12:58:22,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119756144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:22,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010376422] [2021-08-21 12:58:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:22,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:22,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:22,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:22,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:58:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:58:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:22,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010376422] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:58:22,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:58:22,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-21 12:58:22,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038959363] [2021-08-21 12:58:22,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:58:22,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:58:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:58:22,783 INFO L87 Difference]: Start difference. First operand 691 states and 2633 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) [2021-08-21 12:58:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:22,805 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-08-21 12:58:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:58:22,806 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 [2021-08-21 12:58:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:22,813 INFO L225 Difference]: With dead ends: 1250 [2021-08-21 12:58:22,813 INFO L226 Difference]: Without dead ends: 1250 [2021-08-21 12:58:22,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:58:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-08-21 12:58:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-08-21 12:58:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-08-21 12:58:22,839 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-08-21 12:58:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:22,839 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-08-21 12:58:22,839 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) [2021-08-21 12:58:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-08-21 12:58:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:58:22,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:22,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:22,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:23,058 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 [2021-08-21 12:58:23,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 971971041, now seen corresponding path program 1 times [2021-08-21 12:58:23,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:23,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609559835] [2021-08-21 12:58:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:23,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:23,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:23,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609559835] [2021-08-21 12:58:23,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609559835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:23,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73055779] [2021-08-21 12:58:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:23,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:23,181 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:58:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:58:23,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:58:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73055779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:23,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-21 12:58:23,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317670786] [2021-08-21 12:58:23,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:58:23,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:58:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:58:23,445 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:23,523 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-08-21 12:58:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:58:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 24 [2021-08-21 12:58:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:23,539 INFO L225 Difference]: With dead ends: 1934 [2021-08-21 12:58:23,539 INFO L226 Difference]: Without dead ends: 1807 [2021-08-21 12:58:23,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:58:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-08-21 12:58:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-08-21 12:58:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-08-21 12:58:23,576 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-08-21 12:58:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:23,576 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-08-21 12:58:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-08-21 12:58:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:58:23,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:23,579 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:23,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 12:58:23,792 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 [2021-08-21 12:58:23,793 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 770843555, now seen corresponding path program 2 times [2021-08-21 12:58:23,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:23,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48439020] [2021-08-21 12:58:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:23,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:23,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:23,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48439020] [2021-08-21 12:58:23,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48439020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:23,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681298560] [2021-08-21 12:58:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:23,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:23,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:23,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:58:23,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:23,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:58:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:24,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681298560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:24,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:24,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 12:58:24,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672121006] [2021-08-21 12:58:24,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:58:24,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:58:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:58:24,065 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-08-21 12:58:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:24,128 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-08-21 12:58:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:58:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 26 [2021-08-21 12:58:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:24,139 INFO L225 Difference]: With dead ends: 2404 [2021-08-21 12:58:24,139 INFO L226 Difference]: Without dead ends: 2234 [2021-08-21 12:58:24,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:58:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-08-21 12:58:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-08-21 12:58:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-08-21 12:58:24,191 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-08-21 12:58:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:24,192 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-08-21 12:58:24,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-08-21 12:58:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-08-21 12:58:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:58:24,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:24,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:24,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:24,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:24,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1128294111, now seen corresponding path program 1 times [2021-08-21 12:58:24,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:24,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591307541] [2021-08-21 12:58:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:24,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:58:24,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:24,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591307541] [2021-08-21 12:58:24,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591307541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:58:24,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:58:24,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:58:24,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673471091] [2021-08-21 12:58:24,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:58:24,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:58:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:58:24,470 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:24,510 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-08-21 12:58:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:58:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:58:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:24,526 INFO L225 Difference]: With dead ends: 3426 [2021-08-21 12:58:24,526 INFO L226 Difference]: Without dead ends: 3255 [2021-08-21 12:58:24,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:58:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-08-21 12:58:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-08-21 12:58:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-08-21 12:58:24,625 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-08-21 12:58:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:24,631 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-08-21 12:58:24,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-08-21 12:58:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:58:24,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:24,640 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:24,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:58:24,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -448766263, now seen corresponding path program 3 times [2021-08-21 12:58:24,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:24,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18281840] [2021-08-21 12:58:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:24,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:24,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:24,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18281840] [2021-08-21 12:58:24,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18281840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:24,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059384119] [2021-08-21 12:58:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:24,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:24,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:58:24,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:24,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:58:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:25,139 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 12:58:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 40 [2021-08-21 12:58:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:25,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059384119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:25,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:25,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-21 12:58:25,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308090410] [2021-08-21 12:58:25,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:58:25,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:58:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:58:25,319 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:25,956 INFO L93 Difference]: Finished difference Result 11478 states and 44022 transitions. [2021-08-21 12:58:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:58:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:58:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:26,002 INFO L225 Difference]: With dead ends: 11478 [2021-08-21 12:58:26,002 INFO L226 Difference]: Without dead ends: 10563 [2021-08-21 12:58:26,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:58:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10563 states. [2021-08-21 12:58:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10563 to 2938. [2021-08-21 12:58:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-08-21 12:58:26,138 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-08-21 12:58:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:26,139 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-08-21 12:58:26,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-08-21 12:58:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:58:26,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:26,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:26,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:26,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:26,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash 687515522, now seen corresponding path program 1 times [2021-08-21 12:58:26,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:26,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139443968] [2021-08-21 12:58:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:26,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:58:26,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:26,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139443968] [2021-08-21 12:58:26,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139443968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:26,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899737273] [2021-08-21 12:58:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:26,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:26,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:26,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:58:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:58:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:58:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899737273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:26,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:26,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 12:58:26,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649684979] [2021-08-21 12:58:26,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:58:26,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:58:26,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:58:26,660 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-21 12:58:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:26,894 INFO L93 Difference]: Finished difference Result 10521 states and 39058 transitions. [2021-08-21 12:58:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:58:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-08-21 12:58:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:26,925 INFO L225 Difference]: With dead ends: 10521 [2021-08-21 12:58:26,925 INFO L226 Difference]: Without dead ends: 10471 [2021-08-21 12:58:26,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2021-08-21 12:58:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 4032. [2021-08-21 12:58:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 4.0637558918382535) internal successors, (16381), 4031 states have internal predecessors, (16381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 16381 transitions. [2021-08-21 12:58:27,108 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 16381 transitions. Word has length 29 [2021-08-21 12:58:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:27,109 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 16381 transitions. [2021-08-21 12:58:27,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-21 12:58:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 16381 transitions. [2021-08-21 12:58:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:58:27,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:27,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:27,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:27,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash -774339582, now seen corresponding path program 2 times [2021-08-21 12:58:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:27,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360314383] [2021-08-21 12:58:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:27,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:58:27,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:27,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360314383] [2021-08-21 12:58:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360314383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:27,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305062340] [2021-08-21 12:58:27,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:27,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:27,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:27,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:58:27,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:27,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:58:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:58:27,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305062340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:27,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:27,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 12:58:27,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044549787] [2021-08-21 12:58:27,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:58:27,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:58:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:58:27,584 INFO L87 Difference]: Start difference. First operand 4032 states and 16381 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:27,805 INFO L93 Difference]: Finished difference Result 9257 states and 34579 transitions. [2021-08-21 12:58:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:58:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:58:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:27,832 INFO L225 Difference]: With dead ends: 9257 [2021-08-21 12:58:27,833 INFO L226 Difference]: Without dead ends: 9257 [2021-08-21 12:58:27,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2021-08-21 12:58:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 4377. [2021-08-21 12:58:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.039076782449726) internal successors, (17675), 4376 states have internal predecessors, (17675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 17675 transitions. [2021-08-21 12:58:27,966 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 17675 transitions. Word has length 29 [2021-08-21 12:58:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 4377 states and 17675 transitions. [2021-08-21 12:58:27,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 17675 transitions. [2021-08-21 12:58:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:58:27,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:27,977 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:27,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:28,193 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1241894539, now seen corresponding path program 4 times [2021-08-21 12:58:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168263906] [2021-08-21 12:58:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:28,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:28,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:28,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168263906] [2021-08-21 12:58:28,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168263906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:28,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940441588] [2021-08-21 12:58:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:28,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:28,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:58:28,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:58:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:28,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940441588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:28,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:28,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-08-21 12:58:28,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929280887] [2021-08-21 12:58:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:58:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:58:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:58:28,522 INFO L87 Difference]: Start difference. First operand 4377 states and 17675 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:28,613 INFO L93 Difference]: Finished difference Result 8693 states and 34994 transitions. [2021-08-21 12:58:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:58:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 31 [2021-08-21 12:58:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:28,639 INFO L225 Difference]: With dead ends: 8693 [2021-08-21 12:58:28,639 INFO L226 Difference]: Without dead ends: 8349 [2021-08-21 12:58:28,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:58:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-08-21 12:58:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6935. [2021-08-21 12:58:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 4.129795211998847) internal successors, (28636), 6934 states have internal predecessors, (28636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 28636 transitions. [2021-08-21 12:58:28,808 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 28636 transitions. Word has length 31 [2021-08-21 12:58:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:28,808 INFO L470 AbstractCegarLoop]: Abstraction has 6935 states and 28636 transitions. [2021-08-21 12:58:28,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 28636 transitions. [2021-08-21 12:58:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:58:28,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:28,854 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:28,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:29,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:29,067 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1580215652, now seen corresponding path program 3 times [2021-08-21 12:58:29,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:29,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774180656] [2021-08-21 12:58:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:29,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:58:29,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:29,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774180656] [2021-08-21 12:58:29,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774180656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:29,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125296998] [2021-08-21 12:58:29,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:29,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:29,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:29,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:58:29,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:58:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:58:29,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125296998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:29,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:29,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 12:58:29,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496035919] [2021-08-21 12:58:29,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:58:29,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:58:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:58:29,312 INFO L87 Difference]: Start difference. First operand 6935 states and 28636 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:29,370 INFO L93 Difference]: Finished difference Result 8766 states and 35643 transitions. [2021-08-21 12:58:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:58:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 32 [2021-08-21 12:58:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:29,399 INFO L225 Difference]: With dead ends: 8766 [2021-08-21 12:58:29,399 INFO L226 Difference]: Without dead ends: 8766 [2021-08-21 12:58:29,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:58:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8766 states. [2021-08-21 12:58:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8766 to 6543. [2021-08-21 12:58:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6543 states, 6542 states have (on average 4.076123509630083) internal successors, (26666), 6542 states have internal predecessors, (26666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6543 states to 6543 states and 26666 transitions. [2021-08-21 12:58:29,622 INFO L78 Accepts]: Start accepts. Automaton has 6543 states and 26666 transitions. Word has length 32 [2021-08-21 12:58:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:29,623 INFO L470 AbstractCegarLoop]: Abstraction has 6543 states and 26666 transitions. [2021-08-21 12:58:29,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6543 states and 26666 transitions. [2021-08-21 12:58:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:29,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:29,641 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:29,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:29,856 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,SelfDestructingSolverStorable9 [2021-08-21 12:58:29,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash -499344603, now seen corresponding path program 5 times [2021-08-21 12:58:29,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:29,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777410014] [2021-08-21 12:58:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:29,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:29,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:29,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777410014] [2021-08-21 12:58:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777410014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:29,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141438978] [2021-08-21 12:58:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:29,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:29,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:29,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:58:30,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:58:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:58:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:30,741 INFO L354 Elim1Store]: treesize reduction 151, result has 6.2 percent of original size [2021-08-21 12:58:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 33 [2021-08-21 12:58:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:30,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141438978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:30,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:30,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 12:58:30,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924780098] [2021-08-21 12:58:30,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:58:30,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:58:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:30,812 INFO L87 Difference]: Start difference. First operand 6543 states and 26666 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:31,737 INFO L93 Difference]: Finished difference Result 29072 states and 118436 transitions. [2021-08-21 12:58:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:58:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:31,827 INFO L225 Difference]: With dead ends: 29072 [2021-08-21 12:58:31,827 INFO L226 Difference]: Without dead ends: 28155 [2021-08-21 12:58:31,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:58:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28155 states. [2021-08-21 12:58:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28155 to 9895. [2021-08-21 12:58:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9895 states, 9894 states have (on average 4.149484536082475) internal successors, (41055), 9894 states have internal predecessors, (41055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9895 states to 9895 states and 41055 transitions. [2021-08-21 12:58:32,235 INFO L78 Accepts]: Start accepts. Automaton has 9895 states and 41055 transitions. Word has length 34 [2021-08-21 12:58:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:32,236 INFO L470 AbstractCegarLoop]: Abstraction has 9895 states and 41055 transitions. [2021-08-21 12:58:32,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9895 states and 41055 transitions. [2021-08-21 12:58:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:32,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:32,362 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:32,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:32,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:32,577 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1900259559, now seen corresponding path program 6 times [2021-08-21 12:58:32,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:32,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566873548] [2021-08-21 12:58:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:32,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:32,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:32,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566873548] [2021-08-21 12:58:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566873548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:32,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146671249] [2021-08-21 12:58:32,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:32,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:32,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:32,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:58:32,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:58:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:58:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:33,470 INFO L354 Elim1Store]: treesize reduction 22, result has 77.3 percent of original size [2021-08-21 12:58:33,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 108 [2021-08-21 12:58:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:33,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146671249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:33,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:33,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-21 12:58:33,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267392470] [2021-08-21 12:58:33,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:33,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:33,999 INFO L87 Difference]: Start difference. First operand 9895 states and 41055 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:35,416 INFO L93 Difference]: Finished difference Result 30531 states and 124974 transitions. [2021-08-21 12:58:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:58:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:35,533 INFO L225 Difference]: With dead ends: 30531 [2021-08-21 12:58:35,533 INFO L226 Difference]: Without dead ends: 29790 [2021-08-21 12:58:35,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 965.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:58:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29790 states. [2021-08-21 12:58:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29790 to 9631. [2021-08-21 12:58:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 9630 states have (on average 4.1569055036344755) internal successors, (40031), 9630 states have internal predecessors, (40031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 40031 transitions. [2021-08-21 12:58:35,974 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 40031 transitions. Word has length 34 [2021-08-21 12:58:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:35,975 INFO L470 AbstractCegarLoop]: Abstraction has 9631 states and 40031 transitions. [2021-08-21 12:58:35,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 40031 transitions. [2021-08-21 12:58:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:35,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:35,996 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:36,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:36,213 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,SelfDestructingSolverStorable11 [2021-08-21 12:58:36,213 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1343218526, now seen corresponding path program 4 times [2021-08-21 12:58:36,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:36,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930793568] [2021-08-21 12:58:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:36,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:36,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:36,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930793568] [2021-08-21 12:58:36,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930793568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:36,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022807049] [2021-08-21 12:58:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:36,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:36,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:36,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:36,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:58:36,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:58:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:36,977 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-21 12:58:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:58:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022807049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:37,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:37,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:37,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476566724] [2021-08-21 12:58:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:37,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:37,122 INFO L87 Difference]: Start difference. First operand 9631 states and 40031 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:37,851 INFO L93 Difference]: Finished difference Result 31935 states and 130694 transitions. [2021-08-21 12:58:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:58:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:37,962 INFO L225 Difference]: With dead ends: 31935 [2021-08-21 12:58:37,963 INFO L226 Difference]: Without dead ends: 31816 [2021-08-21 12:58:37,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:58:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-08-21 12:58:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 12555. [2021-08-21 12:58:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12554 states have (on average 4.203520790186395) internal successors, (52771), 12554 states have internal predecessors, (52771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 52771 transitions. [2021-08-21 12:58:38,479 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 52771 transitions. Word has length 34 [2021-08-21 12:58:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:38,479 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 52771 transitions. [2021-08-21 12:58:38,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 52771 transitions. [2021-08-21 12:58:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:38,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:38,506 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:38,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 12:58:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:58:38,709 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -534537824, now seen corresponding path program 5 times [2021-08-21 12:58:38,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:38,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855563314] [2021-08-21 12:58:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:38,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:38,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:38,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855563314] [2021-08-21 12:58:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855563314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:38,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710968471] [2021-08-21 12:58:38,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:38,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:38,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:38,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:58:39,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:58:39,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:58:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:39,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-21 12:58:39,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-08-21 12:58:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710968471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:39,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:39,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:58:39,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678291278] [2021-08-21 12:58:39,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:58:39,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:58:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:39,689 INFO L87 Difference]: Start difference. First operand 12555 states and 52771 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:40,779 INFO L93 Difference]: Finished difference Result 45402 states and 183517 transitions. [2021-08-21 12:58:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:58:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:40,931 INFO L225 Difference]: With dead ends: 45402 [2021-08-21 12:58:40,931 INFO L226 Difference]: Without dead ends: 44909 [2021-08-21 12:58:40,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:58:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44909 states. [2021-08-21 12:58:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44909 to 15717. [2021-08-21 12:58:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15717 states, 15716 states have (on average 4.224357342835327) internal successors, (66390), 15716 states have internal predecessors, (66390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15717 states to 15717 states and 66390 transitions. [2021-08-21 12:58:41,604 INFO L78 Accepts]: Start accepts. Automaton has 15717 states and 66390 transitions. Word has length 34 [2021-08-21 12:58:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 15717 states and 66390 transitions. [2021-08-21 12:58:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 15717 states and 66390 transitions. [2021-08-21 12:58:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:41,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:41,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:41,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:41,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:58:41,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2132337696, now seen corresponding path program 6 times [2021-08-21 12:58:41,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:41,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025565672] [2021-08-21 12:58:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:41,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:41,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:41,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025565672] [2021-08-21 12:58:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025565672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:41,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793127240] [2021-08-21 12:58:41,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:41,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:41,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:58:42,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:58:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:58:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-08-21 12:58:42,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:58:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:42,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793127240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:42,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:42,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:42,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161336537] [2021-08-21 12:58:42,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:42,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:42,764 INFO L87 Difference]: Start difference. First operand 15717 states and 66390 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:43,412 INFO L93 Difference]: Finished difference Result 33716 states and 139050 transitions. [2021-08-21 12:58:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:58:43,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:43,527 INFO L225 Difference]: With dead ends: 33716 [2021-08-21 12:58:43,527 INFO L226 Difference]: Without dead ends: 33341 [2021-08-21 12:58:43,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:58:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33341 states. [2021-08-21 12:58:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33341 to 15849. [2021-08-21 12:58:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15849 states, 15848 states have (on average 4.226148409893993) internal successors, (66976), 15848 states have internal predecessors, (66976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15849 states to 15849 states and 66976 transitions. [2021-08-21 12:58:44,182 INFO L78 Accepts]: Start accepts. Automaton has 15849 states and 66976 transitions. Word has length 34 [2021-08-21 12:58:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:44,183 INFO L470 AbstractCegarLoop]: Abstraction has 15849 states and 66976 transitions. [2021-08-21 12:58:44,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 15849 states and 66976 transitions. [2021-08-21 12:58:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:44,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:44,217 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:44,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:44,418 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,SelfDestructingSolverStorable14 [2021-08-21 12:58:44,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 688857970, now seen corresponding path program 7 times [2021-08-21 12:58:44,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:44,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340722510] [2021-08-21 12:58:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:44,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:44,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:44,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340722510] [2021-08-21 12:58:44,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340722510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:44,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335475166] [2021-08-21 12:58:44,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:44,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:44,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:44,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:58:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:58:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:45,212 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:45,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-08-21 12:58:45,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-08-21 12:58:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:45,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335475166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:45,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:45,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135267969] [2021-08-21 12:58:45,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:45,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:45,356 INFO L87 Difference]: Start difference. First operand 15849 states and 66976 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:46,426 INFO L93 Difference]: Finished difference Result 32378 states and 131621 transitions. [2021-08-21 12:58:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:58:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:46,538 INFO L225 Difference]: With dead ends: 32378 [2021-08-21 12:58:46,538 INFO L226 Difference]: Without dead ends: 32259 [2021-08-21 12:58:46,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:58:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32259 states. [2021-08-21 12:58:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32259 to 15959. [2021-08-21 12:58:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15959 states, 15958 states have (on average 4.2240255671136735) internal successors, (67407), 15958 states have internal predecessors, (67407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15959 states to 15959 states and 67407 transitions. [2021-08-21 12:58:47,096 INFO L78 Accepts]: Start accepts. Automaton has 15959 states and 67407 transitions. Word has length 34 [2021-08-21 12:58:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 15959 states and 67407 transitions. [2021-08-21 12:58:47,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 15959 states and 67407 transitions. [2021-08-21 12:58:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:47,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:47,130 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:47,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:47,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:47,347 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:47,347 INFO L82 PathProgramCache]: Analyzing trace with hash -85960544, now seen corresponding path program 8 times [2021-08-21 12:58:47,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:47,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740621602] [2021-08-21 12:58:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:47,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:47,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:47,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740621602] [2021-08-21 12:58:47,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740621602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:47,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710927477] [2021-08-21 12:58:47,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:47,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:47,444 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:58:47,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:58:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:48,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:48,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-21 12:58:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:58:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:48,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710927477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:48,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:48,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:48,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368890439] [2021-08-21 12:58:48,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:48,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:48,253 INFO L87 Difference]: Start difference. First operand 15959 states and 67407 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:48,900 INFO L93 Difference]: Finished difference Result 34676 states and 142781 transitions. [2021-08-21 12:58:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:58:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:49,004 INFO L225 Difference]: With dead ends: 34676 [2021-08-21 12:58:49,004 INFO L226 Difference]: Without dead ends: 34557 [2021-08-21 12:58:49,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:58:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34557 states. [2021-08-21 12:58:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34557 to 15725. [2021-08-21 12:58:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15725 states, 15724 states have (on average 4.221254133808191) internal successors, (66375), 15724 states have internal predecessors, (66375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15725 states to 15725 states and 66375 transitions. [2021-08-21 12:58:49,458 INFO L78 Accepts]: Start accepts. Automaton has 15725 states and 66375 transitions. Word has length 34 [2021-08-21 12:58:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:49,458 INFO L470 AbstractCegarLoop]: Abstraction has 15725 states and 66375 transitions. [2021-08-21 12:58:49,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 15725 states and 66375 transitions. [2021-08-21 12:58:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:49,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:49,490 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:49,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:49,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:58:49,690 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -254518890, now seen corresponding path program 9 times [2021-08-21 12:58:49,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:49,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507516] [2021-08-21 12:58:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:49,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:49,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:49,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507516] [2021-08-21 12:58:49,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:49,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592863782] [2021-08-21 12:58:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:49,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:49,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:49,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:49,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:58:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:58:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:50,585 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 12:58:50,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 54 [2021-08-21 12:58:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:58:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:50,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592863782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:50,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:50,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:58:50,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108783304] [2021-08-21 12:58:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:58:50,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:58:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:50,831 INFO L87 Difference]: Start difference. First operand 15725 states and 66375 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:51,868 INFO L93 Difference]: Finished difference Result 38828 states and 160687 transitions. [2021-08-21 12:58:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:58:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:52,021 INFO L225 Difference]: With dead ends: 38828 [2021-08-21 12:58:52,021 INFO L226 Difference]: Without dead ends: 38709 [2021-08-21 12:58:52,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:58:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38709 states. [2021-08-21 12:58:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38709 to 18275. [2021-08-21 12:58:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18275 states, 18274 states have (on average 4.248276239465908) internal successors, (77633), 18274 states have internal predecessors, (77633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18275 states to 18275 states and 77633 transitions. [2021-08-21 12:58:52,871 INFO L78 Accepts]: Start accepts. Automaton has 18275 states and 77633 transitions. Word has length 34 [2021-08-21 12:58:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:52,871 INFO L470 AbstractCegarLoop]: Abstraction has 18275 states and 77633 transitions. [2021-08-21 12:58:52,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18275 states and 77633 transitions. [2021-08-21 12:58:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:52,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:52,905 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:52,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:53,122 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,SelfDestructingSolverStorable17 [2021-08-21 12:58:53,123 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2132275240, now seen corresponding path program 10 times [2021-08-21 12:58:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:53,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209641835] [2021-08-21 12:58:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:53,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:53,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:53,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209641835] [2021-08-21 12:58:53,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209641835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:53,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117048684] [2021-08-21 12:58:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:53,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:53,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:53,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:58:53,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:58:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:54,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-08-21 12:58:54,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:58:54,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:58:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117048684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:54,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:54,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:54,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812037044] [2021-08-21 12:58:54,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:54,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:54,157 INFO L87 Difference]: Start difference. First operand 18275 states and 77633 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:54,821 INFO L93 Difference]: Finished difference Result 33210 states and 138126 transitions. [2021-08-21 12:58:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:58:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:54,925 INFO L225 Difference]: With dead ends: 33210 [2021-08-21 12:58:54,925 INFO L226 Difference]: Without dead ends: 33027 [2021-08-21 12:58:54,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:58:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33027 states. [2021-08-21 12:58:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33027 to 17505. [2021-08-21 12:58:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17505 states, 17504 states have (on average 4.241830438756856) internal successors, (74249), 17504 states have internal predecessors, (74249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 74249 transitions. [2021-08-21 12:58:55,380 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 74249 transitions. Word has length 34 [2021-08-21 12:58:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:55,381 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 74249 transitions. [2021-08-21 12:58:55,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 74249 transitions. [2021-08-21 12:58:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:55,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:55,416 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:55,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:55,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:55,616 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 564892184, now seen corresponding path program 11 times [2021-08-21 12:58:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:55,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653987952] [2021-08-21 12:58:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:55,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:55,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:55,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653987952] [2021-08-21 12:58:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653987952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:55,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335556158] [2021-08-21 12:58:55,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:55,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:55,705 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:55,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:58:56,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:58:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:58:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:56,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-08-21 12:58:56,960 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 12:58:56,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 35 [2021-08-21 12:58:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:56,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335556158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:56,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:56,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:58:56,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535758206] [2021-08-21 12:58:56,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:56,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:56,999 INFO L87 Difference]: Start difference. First operand 17505 states and 74249 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:57,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:57,963 INFO L93 Difference]: Finished difference Result 35076 states and 144936 transitions. [2021-08-21 12:58:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:58:57,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:58:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:58,092 INFO L225 Difference]: With dead ends: 35076 [2021-08-21 12:58:58,093 INFO L226 Difference]: Without dead ends: 34614 [2021-08-21 12:58:58,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34614 states. [2021-08-21 12:58:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34614 to 16280. [2021-08-21 12:58:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16280 states, 16279 states have (on average 4.238651022790098) internal successors, (69001), 16279 states have internal predecessors, (69001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16280 states to 16280 states and 69001 transitions. [2021-08-21 12:58:58,592 INFO L78 Accepts]: Start accepts. Automaton has 16280 states and 69001 transitions. Word has length 34 [2021-08-21 12:58:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:58,592 INFO L470 AbstractCegarLoop]: Abstraction has 16280 states and 69001 transitions. [2021-08-21 12:58:58,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16280 states and 69001 transitions. [2021-08-21 12:58:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:58:58,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:58,625 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:58,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:58,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:58,826 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:58:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1426514422, now seen corresponding path program 12 times [2021-08-21 12:58:58,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:58,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162614966] [2021-08-21 12:58:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:58,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:58,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:58,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162614966] [2021-08-21 12:58:58,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162614966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:58,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328530419] [2021-08-21 12:58:58,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:58,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:58,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:58,943 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:58:59,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:58:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:58:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:59,810 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 12:58:59,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-08-21 12:59:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:59:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:00,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328530419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:00,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:00,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:59:00,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776399383] [2021-08-21 12:59:00,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:00,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:00,189 INFO L87 Difference]: Start difference. First operand 16280 states and 69001 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:01,637 INFO L93 Difference]: Finished difference Result 46471 states and 191651 transitions. [2021-08-21 12:59:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:59:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:01,789 INFO L225 Difference]: With dead ends: 46471 [2021-08-21 12:59:01,789 INFO L226 Difference]: Without dead ends: 46352 [2021-08-21 12:59:01,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:59:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46352 states. [2021-08-21 12:59:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46352 to 17562. [2021-08-21 12:59:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17562 states, 17561 states have (on average 4.25414270257958) internal successors, (74707), 17561 states have internal predecessors, (74707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17562 states to 17562 states and 74707 transitions. [2021-08-21 12:59:02,389 INFO L78 Accepts]: Start accepts. Automaton has 17562 states and 74707 transitions. Word has length 34 [2021-08-21 12:59:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 17562 states and 74707 transitions. [2021-08-21 12:59:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 17562 states and 74707 transitions. [2021-08-21 12:59:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:02,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:02,424 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:02,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:02,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:02,638 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1913314904, now seen corresponding path program 13 times [2021-08-21 12:59:02,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:02,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560353961] [2021-08-21 12:59:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:02,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:02,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:02,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560353961] [2021-08-21 12:59:02,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560353961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:02,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931609068] [2021-08-21 12:59:02,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:02,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:02,783 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:02,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:59:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:03,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-08-21 12:59:03,857 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:03,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931609068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:03,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:03,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:03,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329576929] [2021-08-21 12:59:03,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:03,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:03,882 INFO L87 Difference]: Start difference. First operand 17562 states and 74707 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:04,499 INFO L93 Difference]: Finished difference Result 32857 states and 136071 transitions. [2021-08-21 12:59:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:59:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:04,608 INFO L225 Difference]: With dead ends: 32857 [2021-08-21 12:59:04,608 INFO L226 Difference]: Without dead ends: 32610 [2021-08-21 12:59:04,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:59:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32610 states. [2021-08-21 12:59:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32610 to 17242. [2021-08-21 12:59:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17242 states, 17241 states have (on average 4.250275506061134) internal successors, (73279), 17241 states have internal predecessors, (73279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17242 states to 17242 states and 73279 transitions. [2021-08-21 12:59:05,069 INFO L78 Accepts]: Start accepts. Automaton has 17242 states and 73279 transitions. Word has length 34 [2021-08-21 12:59:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:05,069 INFO L470 AbstractCegarLoop]: Abstraction has 17242 states and 73279 transitions. [2021-08-21 12:59:05,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17242 states and 73279 transitions. [2021-08-21 12:59:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:05,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:05,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:05,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 12:59:05,302 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,SelfDestructingSolverStorable21 [2021-08-21 12:59:05,302 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash -227262226, now seen corresponding path program 14 times [2021-08-21 12:59:05,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:05,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202120582] [2021-08-21 12:59:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:05,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:05,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:05,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202120582] [2021-08-21 12:59:05,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202120582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:05,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145815448] [2021-08-21 12:59:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:05,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:05,437 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:05,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:59:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:59:06,456 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145815448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:06,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022559558] [2021-08-21 12:59:06,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:06,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:06,486 INFO L87 Difference]: Start difference. First operand 17242 states and 73279 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:07,213 INFO L93 Difference]: Finished difference Result 30360 states and 125966 transitions. [2021-08-21 12:59:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:59:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:07,311 INFO L225 Difference]: With dead ends: 30360 [2021-08-21 12:59:07,311 INFO L226 Difference]: Without dead ends: 30113 [2021-08-21 12:59:07,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30113 states. [2021-08-21 12:59:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30113 to 18188. [2021-08-21 12:59:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18188 states, 18187 states have (on average 4.27239236817507) internal successors, (77702), 18187 states have internal predecessors, (77702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18188 states to 18188 states and 77702 transitions. [2021-08-21 12:59:07,759 INFO L78 Accepts]: Start accepts. Automaton has 18188 states and 77702 transitions. Word has length 34 [2021-08-21 12:59:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:07,759 INFO L470 AbstractCegarLoop]: Abstraction has 18188 states and 77702 transitions. [2021-08-21 12:59:07,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 18188 states and 77702 transitions. [2021-08-21 12:59:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:07,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:07,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:07,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:07,995 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,SelfDestructingSolverStorable22 [2021-08-21 12:59:07,996 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash 475063918, now seen corresponding path program 15 times [2021-08-21 12:59:07,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:07,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799978668] [2021-08-21 12:59:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:07,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:08,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:08,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799978668] [2021-08-21 12:59:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799978668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:08,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556417555] [2021-08-21 12:59:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:08,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:08,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:08,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:59:08,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:59:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:59:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:09,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:59:09,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-08-21 12:59:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:09,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556417555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:09,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:09,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:59:09,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852730491] [2021-08-21 12:59:09,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:09,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:09,220 INFO L87 Difference]: Start difference. First operand 18188 states and 77702 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:10,415 INFO L93 Difference]: Finished difference Result 44712 states and 185395 transitions. [2021-08-21 12:59:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:59:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:10,577 INFO L225 Difference]: With dead ends: 44712 [2021-08-21 12:59:10,577 INFO L226 Difference]: Without dead ends: 44154 [2021-08-21 12:59:10,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 786.9ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:59:10,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44154 states. [2021-08-21 12:59:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44154 to 18605. [2021-08-21 12:59:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18605 states, 18604 states have (on average 4.273758331541604) internal successors, (79509), 18604 states have internal predecessors, (79509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18605 states to 18605 states and 79509 transitions. [2021-08-21 12:59:11,285 INFO L78 Accepts]: Start accepts. Automaton has 18605 states and 79509 transitions. Word has length 34 [2021-08-21 12:59:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:11,285 INFO L470 AbstractCegarLoop]: Abstraction has 18605 states and 79509 transitions. [2021-08-21 12:59:11,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18605 states and 79509 transitions. [2021-08-21 12:59:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:11,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:11,321 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:11,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:11,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:11,522 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1276481494, now seen corresponding path program 16 times [2021-08-21 12:59:11,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:11,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846560924] [2021-08-21 12:59:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:11,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:11,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846560924] [2021-08-21 12:59:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846560924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:11,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964206015] [2021-08-21 12:59:11,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:11,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:11,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:11,669 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:11,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:59:12,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:12,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:12,787 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:12,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964206015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:12,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:12,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:12,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447963414] [2021-08-21 12:59:12,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:12,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:12,819 INFO L87 Difference]: Start difference. First operand 18605 states and 79509 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:13,567 INFO L93 Difference]: Finished difference Result 35841 states and 149522 transitions. [2021-08-21 12:59:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:59:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:13,694 INFO L225 Difference]: With dead ends: 35841 [2021-08-21 12:59:13,694 INFO L226 Difference]: Without dead ends: 35466 [2021-08-21 12:59:13,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:59:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35466 states. [2021-08-21 12:59:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35466 to 18473. [2021-08-21 12:59:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18473 states, 18472 states have (on average 4.272574707665656) internal successors, (78923), 18472 states have internal predecessors, (78923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18473 states to 18473 states and 78923 transitions. [2021-08-21 12:59:14,298 INFO L78 Accepts]: Start accepts. Automaton has 18473 states and 78923 transitions. Word has length 34 [2021-08-21 12:59:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 18473 states and 78923 transitions. [2021-08-21 12:59:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18473 states and 78923 transitions. [2021-08-21 12:59:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:14,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:14,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:14,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 12:59:14,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:14,539 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2050047720, now seen corresponding path program 17 times [2021-08-21 12:59:14,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:14,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338537042] [2021-08-21 12:59:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:14,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:14,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:14,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338537042] [2021-08-21 12:59:14,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338537042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:14,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917086094] [2021-08-21 12:59:14,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:14,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:14,632 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:59:15,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:59:15,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:15,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:59:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:15,916 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 12:59:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 44 [2021-08-21 12:59:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:59:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917086094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:16,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:16,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:16,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320118910] [2021-08-21 12:59:16,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:16,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:16,008 INFO L87 Difference]: Start difference. First operand 18473 states and 78923 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:17,344 INFO L93 Difference]: Finished difference Result 39451 states and 165129 transitions. [2021-08-21 12:59:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:59:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:17,482 INFO L225 Difference]: With dead ends: 39451 [2021-08-21 12:59:17,482 INFO L226 Difference]: Without dead ends: 39332 [2021-08-21 12:59:17,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:59:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39332 states. [2021-08-21 12:59:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39332 to 20900. [2021-08-21 12:59:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20900 states, 20899 states have (on average 4.297095554811235) internal successors, (89805), 20899 states have internal predecessors, (89805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20900 states to 20900 states and 89805 transitions. [2021-08-21 12:59:18,053 INFO L78 Accepts]: Start accepts. Automaton has 20900 states and 89805 transitions. Word has length 34 [2021-08-21 12:59:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:18,053 INFO L470 AbstractCegarLoop]: Abstraction has 20900 states and 89805 transitions. [2021-08-21 12:59:18,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20900 states and 89805 transitions. [2021-08-21 12:59:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:18,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:18,094 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:18,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:18,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:59:18,294 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash 172291370, now seen corresponding path program 18 times [2021-08-21 12:59:18,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:18,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7563595] [2021-08-21 12:59:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:18,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:18,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:18,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7563595] [2021-08-21 12:59:18,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7563595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:18,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750823381] [2021-08-21 12:59:18,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:18,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:18,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:18,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:18,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:59:19,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:59:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:59:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-08-21 12:59:19,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:19,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750823381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:19,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:19,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:19,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689481128] [2021-08-21 12:59:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:19,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:19,636 INFO L87 Difference]: Start difference. First operand 20900 states and 89805 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:20,187 INFO L93 Difference]: Finished difference Result 37151 states and 155714 transitions. [2021-08-21 12:59:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:59:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:20,463 INFO L225 Difference]: With dead ends: 37151 [2021-08-21 12:59:20,464 INFO L226 Difference]: Without dead ends: 36904 [2021-08-21 12:59:20,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:59:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36904 states. [2021-08-21 12:59:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36904 to 20074. [2021-08-21 12:59:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 20073 states have (on average 4.29078862153141) internal successors, (86129), 20073 states have internal predecessors, (86129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 86129 transitions. [2021-08-21 12:59:20,988 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 86129 transitions. Word has length 34 [2021-08-21 12:59:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:20,988 INFO L470 AbstractCegarLoop]: Abstraction has 20074 states and 86129 transitions. [2021-08-21 12:59:20,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 86129 transitions. [2021-08-21 12:59:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:21,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:21,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:21,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:21,235 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,SelfDestructingSolverStorable26 [2021-08-21 12:59:21,236 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1425508502, now seen corresponding path program 19 times [2021-08-21 12:59:21,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:21,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092035181] [2021-08-21 12:59:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:21,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:21,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:21,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092035181] [2021-08-21 12:59:21,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092035181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:21,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11938715] [2021-08-21 12:59:21,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:21,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:21,339 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:59:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:22,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-08-21 12:59:22,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:22,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:22,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11938715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:22,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:22,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:22,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778838029] [2021-08-21 12:59:22,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:22,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:22,658 INFO L87 Difference]: Start difference. First operand 20074 states and 86129 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:23,309 INFO L93 Difference]: Finished difference Result 39739 states and 166333 transitions. [2021-08-21 12:59:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:59:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:23,449 INFO L225 Difference]: With dead ends: 39739 [2021-08-21 12:59:23,450 INFO L226 Difference]: Without dead ends: 39364 [2021-08-21 12:59:23,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:59:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39364 states. [2021-08-21 12:59:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39364 to 18739. [2021-08-21 12:59:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18739 states, 18738 states have (on average 4.287544028178034) internal successors, (80340), 18738 states have internal predecessors, (80340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18739 states to 18739 states and 80340 transitions. [2021-08-21 12:59:24,089 INFO L78 Accepts]: Start accepts. Automaton has 18739 states and 80340 transitions. Word has length 34 [2021-08-21 12:59:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:24,089 INFO L470 AbstractCegarLoop]: Abstraction has 18739 states and 80340 transitions. [2021-08-21 12:59:24,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18739 states and 80340 transitions. [2021-08-21 12:59:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:24,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:24,125 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:24,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:24,326 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,SelfDestructingSolverStorable27 [2021-08-21 12:59:24,326 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2077304384, now seen corresponding path program 20 times [2021-08-21 12:59:24,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:24,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054484574] [2021-08-21 12:59:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:24,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:24,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:24,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054484574] [2021-08-21 12:59:24,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054484574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:24,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823592159] [2021-08-21 12:59:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:24,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:24,438 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:24,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:59:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:25,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:59:25,688 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:25,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:25,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823592159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:25,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:25,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:25,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407689891] [2021-08-21 12:59:25,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:25,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:25,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:25,719 INFO L87 Difference]: Start difference. First operand 18739 states and 80340 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:26,260 INFO L93 Difference]: Finished difference Result 30406 states and 127040 transitions. [2021-08-21 12:59:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:59:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:26,365 INFO L225 Difference]: With dead ends: 30406 [2021-08-21 12:59:26,366 INFO L226 Difference]: Without dead ends: 30223 [2021-08-21 12:59:26,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:59:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30223 states. [2021-08-21 12:59:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30223 to 18739. [2021-08-21 12:59:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18739 states, 18738 states have (on average 4.287544028178034) internal successors, (80340), 18738 states have internal predecessors, (80340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18739 states to 18739 states and 80340 transitions. [2021-08-21 12:59:26,827 INFO L78 Accepts]: Start accepts. Automaton has 18739 states and 80340 transitions. Word has length 34 [2021-08-21 12:59:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 18739 states and 80340 transitions. [2021-08-21 12:59:26,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18739 states and 80340 transitions. [2021-08-21 12:59:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:26,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:26,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:26,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:27,065 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,SelfDestructingSolverStorable28 [2021-08-21 12:59:27,067 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1515336768, now seen corresponding path program 21 times [2021-08-21 12:59:27,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:27,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207661868] [2021-08-21 12:59:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:27,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:27,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:27,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207661868] [2021-08-21 12:59:27,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207661868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:27,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219282426] [2021-08-21 12:59:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:27,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:27,177 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:27,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:59:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:59:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:59:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:28,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:28,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:59:28,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-08-21 12:59:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:28,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219282426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:28,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 12:59:28,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036094728] [2021-08-21 12:59:28,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:28,530 INFO L87 Difference]: Start difference. First operand 18739 states and 80340 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:29,586 INFO L93 Difference]: Finished difference Result 47721 states and 198303 transitions. [2021-08-21 12:59:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:59:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:29,917 INFO L225 Difference]: With dead ends: 47721 [2021-08-21 12:59:29,918 INFO L226 Difference]: Without dead ends: 47163 [2021-08-21 12:59:29,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:59:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47163 states. [2021-08-21 12:59:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47163 to 18887. [2021-08-21 12:59:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18887 states, 18886 states have (on average 4.2894207349359315) internal successors, (81010), 18886 states have internal predecessors, (81010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18887 states to 18887 states and 81010 transitions. [2021-08-21 12:59:30,515 INFO L78 Accepts]: Start accepts. Automaton has 18887 states and 81010 transitions. Word has length 34 [2021-08-21 12:59:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:30,516 INFO L470 AbstractCegarLoop]: Abstraction has 18887 states and 81010 transitions. [2021-08-21 12:59:30,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18887 states and 81010 transitions. [2021-08-21 12:59:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:30,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:30,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:30,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:30,754 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1028085116, now seen corresponding path program 22 times [2021-08-21 12:59:30,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:30,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114260464] [2021-08-21 12:59:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:30,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:30,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:30,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114260464] [2021-08-21 12:59:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114260464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126791936] [2021-08-21 12:59:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:30,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:30,838 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:30,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:59:31,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:59:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:32,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:32,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:32,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126791936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:32,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:32,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:32,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810747386] [2021-08-21 12:59:32,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:32,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:32,175 INFO L87 Difference]: Start difference. First operand 18887 states and 81010 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:32,902 INFO L93 Difference]: Finished difference Result 38700 states and 161786 transitions. [2021-08-21 12:59:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:59:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:33,026 INFO L225 Difference]: With dead ends: 38700 [2021-08-21 12:59:33,027 INFO L226 Difference]: Without dead ends: 38325 [2021-08-21 12:59:33,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:59:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38325 states. [2021-08-21 12:59:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38325 to 18739. [2021-08-21 12:59:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18739 states, 18738 states have (on average 4.287544028178034) internal successors, (80340), 18738 states have internal predecessors, (80340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18739 states to 18739 states and 80340 transitions. [2021-08-21 12:59:33,607 INFO L78 Accepts]: Start accepts. Automaton has 18739 states and 80340 transitions. Word has length 34 [2021-08-21 12:59:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:33,607 INFO L470 AbstractCegarLoop]: Abstraction has 18739 states and 80340 transitions. [2021-08-21 12:59:33,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18739 states and 80340 transitions. [2021-08-21 12:59:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:33,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:33,642 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:33,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:33,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:33,843 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash 213845226, now seen corresponding path program 23 times [2021-08-21 12:59:33,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:33,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326277438] [2021-08-21 12:59:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:33,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:33,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:33,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326277438] [2021-08-21 12:59:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326277438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:33,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147449978] [2021-08-21 12:59:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:33,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:33,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:33,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:33,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:59:34,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:59:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:34,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:59:34,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:35,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:35,260 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147449978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:35,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456123735] [2021-08-21 12:59:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:35,291 INFO L87 Difference]: Start difference. First operand 18739 states and 80340 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:35,762 INFO L93 Difference]: Finished difference Result 28934 states and 121394 transitions. [2021-08-21 12:59:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:59:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:35,851 INFO L225 Difference]: With dead ends: 28934 [2021-08-21 12:59:35,851 INFO L226 Difference]: Without dead ends: 28687 [2021-08-21 12:59:35,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:59:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-08-21 12:59:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 19044. [2021-08-21 12:59:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19044 states, 19043 states have (on average 4.287717271438324) internal successors, (81651), 19043 states have internal predecessors, (81651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19044 states to 19044 states and 81651 transitions. [2021-08-21 12:59:36,328 INFO L78 Accepts]: Start accepts. Automaton has 19044 states and 81651 transitions. Word has length 34 [2021-08-21 12:59:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 19044 states and 81651 transitions. [2021-08-21 12:59:36,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 19044 states and 81651 transitions. [2021-08-21 12:59:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:59:36,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:36,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:36,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:36,571 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,SelfDestructingSolverStorable31 [2021-08-21 12:59:36,571 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash 243547430, now seen corresponding path program 24 times [2021-08-21 12:59:36,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:36,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91422433] [2021-08-21 12:59:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:36,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:36,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:36,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91422433] [2021-08-21 12:59:36,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91422433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:36,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800753859] [2021-08-21 12:59:36,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:36,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:36,662 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:36,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:59:37,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:59:37,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:37,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:59:37,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:59:38,115 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:59:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:59:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800753859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:38,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:38,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 12:59:38,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188452228] [2021-08-21 12:59:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:59:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:59:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:38,149 INFO L87 Difference]: Start difference. First operand 19044 states and 81651 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:38,643 INFO L93 Difference]: Finished difference Result 34055 states and 142854 transitions. [2021-08-21 12:59:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:59:38,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:59:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:38,765 INFO L225 Difference]: With dead ends: 34055 [2021-08-21 12:59:38,765 INFO L226 Difference]: Without dead ends: 33808 [2021-08-21 12:59:38,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:59:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33808 states. [2021-08-21 12:59:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33808 to 18759. [2021-08-21 12:59:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18759 states, 18758 states have (on average 4.287770551231475) internal successors, (80430), 18758 states have internal predecessors, (80430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18759 states to 18759 states and 80430 transitions. [2021-08-21 12:59:39,287 INFO L78 Accepts]: Start accepts. Automaton has 18759 states and 80430 transitions. Word has length 34 [2021-08-21 12:59:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:39,288 INFO L470 AbstractCegarLoop]: Abstraction has 18759 states and 80430 transitions. [2021-08-21 12:59:39,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18759 states and 80430 transitions. [2021-08-21 12:59:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:59:39,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:39,324 INFO L512 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1] [2021-08-21 12:59:39,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:39,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:39,526 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1414841628, now seen corresponding path program 25 times [2021-08-21 12:59:39,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:39,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716800154] [2021-08-21 12:59:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:39,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:59:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716800154] [2021-08-21 12:59:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716800154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384421101] [2021-08-21 12:59:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:39,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:39,558 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:59:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:59:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:59:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384421101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:40,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:40,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 12:59:40,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131130868] [2021-08-21 12:59:40,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:59:40,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:59:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:59:40,712 INFO L87 Difference]: Start difference. First operand 18759 states and 80430 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:40,941 INFO L93 Difference]: Finished difference Result 35190 states and 147900 transitions. [2021-08-21 12:59:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:59:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 36 [2021-08-21 12:59:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:41,055 INFO L225 Difference]: With dead ends: 35190 [2021-08-21 12:59:41,055 INFO L226 Difference]: Without dead ends: 34632 [2021-08-21 12:59:41,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:59:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34632 states. [2021-08-21 12:59:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34632 to 29567. [2021-08-21 12:59:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29567 states, 29566 states have (on average 4.349793681931949) internal successors, (128606), 29566 states have internal predecessors, (128606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29567 states to 29567 states and 128606 transitions. [2021-08-21 12:59:41,870 INFO L78 Accepts]: Start accepts. Automaton has 29567 states and 128606 transitions. Word has length 36 [2021-08-21 12:59:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:41,870 INFO L470 AbstractCegarLoop]: Abstraction has 29567 states and 128606 transitions. [2021-08-21 12:59:41,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 29567 states and 128606 transitions. [2021-08-21 12:59:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:59:41,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:41,935 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:41,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:42,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:42,137 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 903309197, now seen corresponding path program 7 times [2021-08-21 12:59:42,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:42,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615239506] [2021-08-21 12:59:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:42,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:42,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:42,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615239506] [2021-08-21 12:59:42,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615239506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:42,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626108498] [2021-08-21 12:59:42,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:42,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:42,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:42,267 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:42,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:59:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:59:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:43,855 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:59:43,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-08-21 12:59:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:43,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626108498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:43,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:43,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 12:59:43,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052088968] [2021-08-21 12:59:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:59:43,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:59:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:59:43,897 INFO L87 Difference]: Start difference. First operand 29567 states and 128606 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:45,210 INFO L93 Difference]: Finished difference Result 67950 states and 289363 transitions. [2021-08-21 12:59:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:59:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:59:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:45,472 INFO L225 Difference]: With dead ends: 67950 [2021-08-21 12:59:45,473 INFO L226 Difference]: Without dead ends: 66262 [2021-08-21 12:59:45,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:59:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66262 states. [2021-08-21 12:59:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66262 to 30743. [2021-08-21 12:59:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30743 states, 30742 states have (on average 4.2880749463275) internal successors, (131824), 30742 states have internal predecessors, (131824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30743 states to 30743 states and 131824 transitions. [2021-08-21 12:59:46,847 INFO L78 Accepts]: Start accepts. Automaton has 30743 states and 131824 transitions. Word has length 39 [2021-08-21 12:59:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:46,847 INFO L470 AbstractCegarLoop]: Abstraction has 30743 states and 131824 transitions. [2021-08-21 12:59:46,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 30743 states and 131824 transitions. [2021-08-21 12:59:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:59:46,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:46,919 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:46,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:47,119 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,SelfDestructingSolverStorable34 [2021-08-21 12:59:47,119 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1417556154, now seen corresponding path program 26 times [2021-08-21 12:59:47,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:47,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064671262] [2021-08-21 12:59:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:47,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:47,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:47,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064671262] [2021-08-21 12:59:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064671262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:47,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754348412] [2021-08-21 12:59:47,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:47,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:47,458 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:47,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:59:48,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:59:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:49,154 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:59:49,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-08-21 12:59:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 12:59:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:49,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754348412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:49,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:49,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 12:59:49,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615220619] [2021-08-21 12:59:49,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:59:49,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:59:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:59:49,274 INFO L87 Difference]: Start difference. First operand 30743 states and 131824 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:51,249 INFO L93 Difference]: Finished difference Result 93927 states and 391933 transitions. [2021-08-21 12:59:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:59:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:59:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:51,842 INFO L225 Difference]: With dead ends: 93927 [2021-08-21 12:59:51,842 INFO L226 Difference]: Without dead ends: 93472 [2021-08-21 12:59:51,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:59:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93472 states. [2021-08-21 12:59:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93472 to 37054. [2021-08-21 12:59:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37054 states, 37053 states have (on average 4.283242922300489) internal successors, (158707), 37053 states have internal predecessors, (158707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37054 states to 37054 states and 158707 transitions. [2021-08-21 12:59:53,600 INFO L78 Accepts]: Start accepts. Automaton has 37054 states and 158707 transitions. Word has length 39 [2021-08-21 12:59:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:53,601 INFO L470 AbstractCegarLoop]: Abstraction has 37054 states and 158707 transitions. [2021-08-21 12:59:53,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37054 states and 158707 transitions. [2021-08-21 12:59:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:59:53,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:53,685 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:53,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:53,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:59:53,900 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:59:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash 999654792, now seen corresponding path program 27 times [2021-08-21 12:59:53,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:53,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060319331] [2021-08-21 12:59:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:53,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:54,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:54,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060319331] [2021-08-21 12:59:54,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060319331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:54,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702992223] [2021-08-21 12:59:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:54,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:54,217 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:54,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:59:55,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:59:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:59:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-08-21 12:59:56,248 INFO L354 Elim1Store]: treesize reduction 57, result has 14.9 percent of original size [2021-08-21 12:59:56,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 46 [2021-08-21 12:59:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702992223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:56,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 12:59:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117661580] [2021-08-21 12:59:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:59:56,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:59:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:59:56,327 INFO L87 Difference]: Start difference. First operand 37054 states and 158707 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:59,722 INFO L93 Difference]: Finished difference Result 126259 states and 524513 transitions. [2021-08-21 12:59:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:59:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:59:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:00,540 INFO L225 Difference]: With dead ends: 126259 [2021-08-21 13:00:00,541 INFO L226 Difference]: Without dead ends: 125702 [2021-08-21 13:00:00,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1394.3ms TimeCoverageRelationStatistics Valid=612, Invalid=3548, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 13:00:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125702 states. [2021-08-21 13:00:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125702 to 38440. [2021-08-21 13:00:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38440 states, 38439 states have (on average 4.29904524051094) internal successors, (165251), 38439 states have internal predecessors, (165251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38440 states to 38440 states and 165251 transitions. [2021-08-21 13:00:03,011 INFO L78 Accepts]: Start accepts. Automaton has 38440 states and 165251 transitions. Word has length 39 [2021-08-21 13:00:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 38440 states and 165251 transitions. [2021-08-21 13:00:03,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 38440 states and 165251 transitions. [2021-08-21 13:00:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:03,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:03,111 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:03,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 13:00:03,324 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,SelfDestructingSolverStorable36 [2021-08-21 13:00:03,325 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1514469896, now seen corresponding path program 28 times [2021-08-21 13:00:03,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:03,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686299012] [2021-08-21 13:00:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:03,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:03,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686299012] [2021-08-21 13:00:03,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686299012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780277968] [2021-08-21 13:00:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:03,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:03,666 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:03,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:00:05,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:00:06,060 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:00:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:00:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780277968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:06,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:06,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:00:06,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398241644] [2021-08-21 13:00:06,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:00:06,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:00:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:00:06,104 INFO L87 Difference]: Start difference. First operand 38440 states and 165251 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:08,192 INFO L93 Difference]: Finished difference Result 97726 states and 409749 transitions. [2021-08-21 13:00:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:00:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:08,826 INFO L225 Difference]: With dead ends: 97726 [2021-08-21 13:00:08,826 INFO L226 Difference]: Without dead ends: 97514 [2021-08-21 13:00:08,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:00:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97514 states. [2021-08-21 13:00:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97514 to 38050. [2021-08-21 13:00:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38050 states, 38049 states have (on average 4.299061736182291) internal successors, (163575), 38049 states have internal predecessors, (163575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38050 states to 38050 states and 163575 transitions. [2021-08-21 13:00:10,706 INFO L78 Accepts]: Start accepts. Automaton has 38050 states and 163575 transitions. Word has length 39 [2021-08-21 13:00:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:10,706 INFO L470 AbstractCegarLoop]: Abstraction has 38050 states and 163575 transitions. [2021-08-21 13:00:10,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 38050 states and 163575 transitions. [2021-08-21 13:00:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:10,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:10,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:10,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:11,007 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1353216810, now seen corresponding path program 29 times [2021-08-21 13:00:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:11,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760464392] [2021-08-21 13:00:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:11,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:11,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:11,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760464392] [2021-08-21 13:00:11,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760464392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:11,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613777994] [2021-08-21 13:00:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:11,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:11,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:11,375 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:11,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:00:12,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:00:12,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:00:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:13,359 INFO L354 Elim1Store]: treesize reduction 36, result has 65.7 percent of original size [2021-08-21 13:00:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 92 [2021-08-21 13:00:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-08-21 13:00:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:13,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613777994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:13,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:13,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:00:13,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500669743] [2021-08-21 13:00:13,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:00:13,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:00:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:00:13,950 INFO L87 Difference]: Start difference. First operand 38050 states and 163575 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:17,355 INFO L93 Difference]: Finished difference Result 100352 states and 413563 transitions. [2021-08-21 13:00:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:00:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:17,784 INFO L225 Difference]: With dead ends: 100352 [2021-08-21 13:00:17,784 INFO L226 Difference]: Without dead ends: 99763 [2021-08-21 13:00:17,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2123.4ms TimeCoverageRelationStatistics Valid=596, Invalid=2710, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:00:18,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99763 states. [2021-08-21 13:00:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99763 to 40454. [2021-08-21 13:00:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40454 states, 40453 states have (on average 4.297307987046696) internal successors, (173839), 40453 states have internal predecessors, (173839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40454 states to 40454 states and 173839 transitions. [2021-08-21 13:00:19,775 INFO L78 Accepts]: Start accepts. Automaton has 40454 states and 173839 transitions. Word has length 39 [2021-08-21 13:00:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:19,775 INFO L470 AbstractCegarLoop]: Abstraction has 40454 states and 173839 transitions. [2021-08-21 13:00:19,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 40454 states and 173839 transitions. [2021-08-21 13:00:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:20,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:20,121 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:20,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:20,348 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,SelfDestructingSolverStorable38 [2021-08-21 13:00:20,349 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2128035324, now seen corresponding path program 30 times [2021-08-21 13:00:20,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:20,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715830212] [2021-08-21 13:00:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:20,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:20,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:20,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715830212] [2021-08-21 13:00:20,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715830212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:20,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968319277] [2021-08-21 13:00:20,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:20,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:20,601 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:20,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:00:22,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:00:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:00:22,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:22,814 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-21 13:00:22,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 75 [2021-08-21 13:00:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:00:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:23,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968319277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:23,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:23,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:00:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374421566] [2021-08-21 13:00:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:00:23,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:00:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:00:23,066 INFO L87 Difference]: Start difference. First operand 40454 states and 173839 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:26,296 INFO L93 Difference]: Finished difference Result 132221 states and 549244 transitions. [2021-08-21 13:00:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:00:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:26,954 INFO L225 Difference]: With dead ends: 132221 [2021-08-21 13:00:26,954 INFO L226 Difference]: Without dead ends: 131791 [2021-08-21 13:00:26,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1537.3ms TimeCoverageRelationStatistics Valid=468, Invalid=2954, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:00:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131791 states. [2021-08-21 13:00:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131791 to 43071. [2021-08-21 13:00:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43071 states, 43070 states have (on average 4.317808219178082) internal successors, (185968), 43070 states have internal predecessors, (185968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43071 states to 43071 states and 185968 transitions. [2021-08-21 13:00:29,467 INFO L78 Accepts]: Start accepts. Automaton has 43071 states and 185968 transitions. Word has length 39 [2021-08-21 13:00:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:29,467 INFO L470 AbstractCegarLoop]: Abstraction has 43071 states and 185968 transitions. [2021-08-21 13:00:29,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 43071 states and 185968 transitions. [2021-08-21 13:00:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:29,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:29,561 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:29,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:29,764 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,SelfDestructingSolverStorable39 [2021-08-21 13:00:29,764 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 289175622, now seen corresponding path program 31 times [2021-08-21 13:00:29,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:29,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616854119] [2021-08-21 13:00:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:29,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:29,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:29,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616854119] [2021-08-21 13:00:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616854119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:29,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676026797] [2021-08-21 13:00:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:29,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:29,911 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:29,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:00:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:32,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-08-21 13:00:32,394 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:00:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:00:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676026797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:32,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:00:32,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773624426] [2021-08-21 13:00:32,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:00:32,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:00:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:00:32,429 INFO L87 Difference]: Start difference. First operand 43071 states and 185968 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:34,119 INFO L93 Difference]: Finished difference Result 92159 states and 388816 transitions. [2021-08-21 13:00:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:00:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:34,770 INFO L225 Difference]: With dead ends: 92159 [2021-08-21 13:00:34,770 INFO L226 Difference]: Without dead ends: 92053 [2021-08-21 13:00:34,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:00:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92053 states. [2021-08-21 13:00:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92053 to 41717. [2021-08-21 13:00:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41717 states, 41716 states have (on average 4.316209607824336) internal successors, (180055), 41716 states have internal predecessors, (180055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41717 states to 41717 states and 180055 transitions. [2021-08-21 13:00:36,944 INFO L78 Accepts]: Start accepts. Automaton has 41717 states and 180055 transitions. Word has length 39 [2021-08-21 13:00:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:36,944 INFO L470 AbstractCegarLoop]: Abstraction has 41717 states and 180055 transitions. [2021-08-21 13:00:36,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 41717 states and 180055 transitions. [2021-08-21 13:00:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:37,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:37,047 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:37,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:37,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:37,248 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:37,248 INFO L82 PathProgramCache]: Analyzing trace with hash 350303370, now seen corresponding path program 32 times [2021-08-21 13:00:37,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:37,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970043116] [2021-08-21 13:00:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:37,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:37,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:37,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970043116] [2021-08-21 13:00:37,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970043116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:37,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136797742] [2021-08-21 13:00:37,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:37,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:37,410 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:37,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:00:39,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:40,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-21 13:00:40,169 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:00:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:00:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136797742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:40,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:40,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:00:40,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486606876] [2021-08-21 13:00:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:00:40,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:00:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:00:40,199 INFO L87 Difference]: Start difference. First operand 41717 states and 180055 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:41,918 INFO L93 Difference]: Finished difference Result 100769 states and 423699 transitions. [2021-08-21 13:00:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:00:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:42,618 INFO L225 Difference]: With dead ends: 100769 [2021-08-21 13:00:42,618 INFO L226 Difference]: Without dead ends: 100290 [2021-08-21 13:00:42,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:00:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100290 states. [2021-08-21 13:00:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100290 to 41373. [2021-08-21 13:00:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41373 states, 41372 states have (on average 4.318162041960746) internal successors, (178651), 41372 states have internal predecessors, (178651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41373 states to 41373 states and 178651 transitions. [2021-08-21 13:00:44,382 INFO L78 Accepts]: Start accepts. Automaton has 41373 states and 178651 transitions. Word has length 39 [2021-08-21 13:00:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:44,382 INFO L470 AbstractCegarLoop]: Abstraction has 41373 states and 178651 transitions. [2021-08-21 13:00:44,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 41373 states and 178651 transitions. [2021-08-21 13:00:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:44,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:44,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:44,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:44,679 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,SelfDestructingSolverStorable41 [2021-08-21 13:00:44,680 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash 755079038, now seen corresponding path program 33 times [2021-08-21 13:00:44,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:44,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571193005] [2021-08-21 13:00:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:44,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:45,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:45,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571193005] [2021-08-21 13:00:45,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571193005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:45,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975635395] [2021-08-21 13:00:45,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:45,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:45,066 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:00:46,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:00:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:00:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:47,398 INFO L354 Elim1Store]: treesize reduction 14, result has 77.0 percent of original size [2021-08-21 13:00:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 91 [2021-08-21 13:00:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:00:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975635395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:47,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:00:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601880123] [2021-08-21 13:00:47,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:00:47,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:00:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:00:47,776 INFO L87 Difference]: Start difference. First operand 41373 states and 178651 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:50,934 INFO L93 Difference]: Finished difference Result 117695 states and 493819 transitions. [2021-08-21 13:00:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 13:00:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:51,755 INFO L225 Difference]: With dead ends: 117695 [2021-08-21 13:00:51,755 INFO L226 Difference]: Without dead ends: 117383 [2021-08-21 13:00:51,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1543.8ms TimeCoverageRelationStatistics Valid=448, Invalid=3212, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:00:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117383 states. [2021-08-21 13:00:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117383 to 47566. [2021-08-21 13:00:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47566 states, 47565 states have (on average 4.327846105329549) internal successors, (205854), 47565 states have internal predecessors, (205854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47566 states to 47566 states and 205854 transitions. [2021-08-21 13:00:54,198 INFO L78 Accepts]: Start accepts. Automaton has 47566 states and 205854 transitions. Word has length 39 [2021-08-21 13:00:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:54,198 INFO L470 AbstractCegarLoop]: Abstraction has 47566 states and 205854 transitions. [2021-08-21 13:00:54,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 47566 states and 205854 transitions. [2021-08-21 13:00:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:00:54,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:54,306 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:54,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:54,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:54,507 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:00:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1122677312, now seen corresponding path program 34 times [2021-08-21 13:00:54,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:54,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327531937] [2021-08-21 13:00:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:54,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:54,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:54,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327531937] [2021-08-21 13:00:54,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327531937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:54,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147141350] [2021-08-21 13:00:54,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:54,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:54,661 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:54,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:00:56,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:56,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:00:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-08-21 13:00:57,310 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:00:57,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:00:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:57,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147141350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:57,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:57,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:00:57,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141889725] [2021-08-21 13:00:57,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:00:57,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:00:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:00:57,344 INFO L87 Difference]: Start difference. First operand 47566 states and 205854 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:59,194 INFO L93 Difference]: Finished difference Result 98408 states and 416699 transitions. [2021-08-21 13:00:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:00:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:00:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:59,826 INFO L225 Difference]: With dead ends: 98408 [2021-08-21 13:00:59,826 INFO L226 Difference]: Without dead ends: 98302 [2021-08-21 13:00:59,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:00:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98302 states. [2021-08-21 13:01:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98302 to 44442. [2021-08-21 13:01:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44442 states, 44441 states have (on average 4.327377871785063) internal successors, (192313), 44441 states have internal predecessors, (192313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44442 states to 44442 states and 192313 transitions. [2021-08-21 13:01:01,683 INFO L78 Accepts]: Start accepts. Automaton has 44442 states and 192313 transitions. Word has length 39 [2021-08-21 13:01:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:01,683 INFO L470 AbstractCegarLoop]: Abstraction has 44442 states and 192313 transitions. [2021-08-21 13:01:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44442 states and 192313 transitions. [2021-08-21 13:01:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:02,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:02,046 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:02,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:02,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:02,277 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1574490112, now seen corresponding path program 35 times [2021-08-21 13:01:02,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:02,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7908783] [2021-08-21 13:01:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:02,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:02,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:02,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7908783] [2021-08-21 13:01:02,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7908783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:02,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572966309] [2021-08-21 13:01:02,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:02,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:02,421 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:02,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:01:04,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:01:04,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:01:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2021-08-21 13:01:05,849 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-08-21 13:01:05,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 62 [2021-08-21 13:01:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:05,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572966309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:05,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:05,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:01:05,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288883537] [2021-08-21 13:01:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:01:05,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:01:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:01:05,883 INFO L87 Difference]: Start difference. First operand 44442 states and 192313 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:11,560 INFO L93 Difference]: Finished difference Result 107767 states and 451309 transitions. [2021-08-21 13:01:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:01:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:01:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:12,073 INFO L225 Difference]: With dead ends: 107767 [2021-08-21 13:01:12,074 INFO L226 Difference]: Without dead ends: 106681 [2021-08-21 13:01:12,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1970.7ms TimeCoverageRelationStatistics Valid=539, Invalid=3751, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:01:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106681 states. [2021-08-21 13:01:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106681 to 46768. [2021-08-21 13:01:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46768 states, 46767 states have (on average 4.332221438193598) internal successors, (202605), 46767 states have internal predecessors, (202605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46768 states to 46768 states and 202605 transitions. [2021-08-21 13:01:14,193 INFO L78 Accepts]: Start accepts. Automaton has 46768 states and 202605 transitions. Word has length 39 [2021-08-21 13:01:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:14,193 INFO L470 AbstractCegarLoop]: Abstraction has 46768 states and 202605 transitions. [2021-08-21 13:01:14,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 46768 states and 202605 transitions. [2021-08-21 13:01:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:14,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:14,637 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:14,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:14,848 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,SelfDestructingSolverStorable44 [2021-08-21 13:01:14,849 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:14,849 INFO L82 PathProgramCache]: Analyzing trace with hash -607862208, now seen corresponding path program 36 times [2021-08-21 13:01:14,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:14,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746323753] [2021-08-21 13:01:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:14,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:14,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:14,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746323753] [2021-08-21 13:01:14,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746323753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:14,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873449591] [2021-08-21 13:01:14,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:01:14,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:14,980 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:14,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:01:16,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:01:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:01:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 13:01:17,705 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:01:17,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 50 [2021-08-21 13:01:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873449591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:17,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:17,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:01:17,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929050733] [2021-08-21 13:01:17,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:01:17,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:01:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:01:17,838 INFO L87 Difference]: Start difference. First operand 46768 states and 202605 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:23,262 INFO L93 Difference]: Finished difference Result 164508 states and 687455 transitions. [2021-08-21 13:01:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 13:01:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:01:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:24,329 INFO L225 Difference]: With dead ends: 164508 [2021-08-21 13:01:24,329 INFO L226 Difference]: Without dead ends: 163889 [2021-08-21 13:01:24,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3378 ImplicationChecksByTransitivity, 3215.0ms TimeCoverageRelationStatistics Valid=1815, Invalid=8085, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 13:01:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163889 states. [2021-08-21 13:01:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163889 to 51723. [2021-08-21 13:01:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51723 states, 51722 states have (on average 4.350875836201229) internal successors, (225036), 51722 states have internal predecessors, (225036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51723 states to 51723 states and 225036 transitions. [2021-08-21 13:01:27,660 INFO L78 Accepts]: Start accepts. Automaton has 51723 states and 225036 transitions. Word has length 39 [2021-08-21 13:01:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:27,661 INFO L470 AbstractCegarLoop]: Abstraction has 51723 states and 225036 transitions. [2021-08-21 13:01:27,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51723 states and 225036 transitions. [2021-08-21 13:01:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:27,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:27,791 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:27,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:27,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:01:27,991 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash -190152206, now seen corresponding path program 37 times [2021-08-21 13:01:27,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:27,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193279634] [2021-08-21 13:01:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:27,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:28,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193279634] [2021-08-21 13:01:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193279634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:28,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667469764] [2021-08-21 13:01:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:01:28,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:28,467 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:28,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:01:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:01:30,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:30,829 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:01:30,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-08-21 13:01:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:01:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667469764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:30,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:30,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:01:30,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969701353] [2021-08-21 13:01:30,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:01:30,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:01:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:01:30,956 INFO L87 Difference]: Start difference. First operand 51723 states and 225036 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:33,479 INFO L93 Difference]: Finished difference Result 105702 states and 446465 transitions. [2021-08-21 13:01:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:01:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:01:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:34,067 INFO L225 Difference]: With dead ends: 105702 [2021-08-21 13:01:34,068 INFO L226 Difference]: Without dead ends: 105100 [2021-08-21 13:01:34,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=308, Invalid=1948, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:01:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105100 states. [2021-08-21 13:01:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105100 to 54555. [2021-08-21 13:01:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54555 states, 54554 states have (on average 4.355555962899146) internal successors, (237613), 54554 states have internal predecessors, (237613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54555 states to 54555 states and 237613 transitions. [2021-08-21 13:01:36,320 INFO L78 Accepts]: Start accepts. Automaton has 54555 states and 237613 transitions. Word has length 39 [2021-08-21 13:01:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:36,321 INFO L470 AbstractCegarLoop]: Abstraction has 54555 states and 237613 transitions. [2021-08-21 13:01:36,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 54555 states and 237613 transitions. [2021-08-21 13:01:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:36,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:36,846 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:36,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:37,068 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,SelfDestructingSolverStorable46 [2021-08-21 13:01:37,069 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1145290176, now seen corresponding path program 38 times [2021-08-21 13:01:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:37,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879676343] [2021-08-21 13:01:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:37,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:37,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:37,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879676343] [2021-08-21 13:01:37,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879676343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:37,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000969018] [2021-08-21 13:01:37,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:37,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:37,379 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:37,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:01:39,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:01:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:40,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-08-21 13:01:40,144 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:01:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:01:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000969018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:40,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:40,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:01:40,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785486188] [2021-08-21 13:01:40,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:01:40,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:01:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:01:40,177 INFO L87 Difference]: Start difference. First operand 54555 states and 237613 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:42,241 INFO L93 Difference]: Finished difference Result 100155 states and 425770 transitions. [2021-08-21 13:01:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:01:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:01:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:42,703 INFO L225 Difference]: With dead ends: 100155 [2021-08-21 13:01:42,703 INFO L226 Difference]: Without dead ends: 99601 [2021-08-21 13:01:42,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1612, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:01:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99601 states. [2021-08-21 13:01:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99601 to 53955. [2021-08-21 13:01:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53955 states, 53954 states have (on average 4.35450569003225) internal successors, (234943), 53954 states have internal predecessors, (234943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53955 states to 53955 states and 234943 transitions. [2021-08-21 13:01:44,764 INFO L78 Accepts]: Start accepts. Automaton has 53955 states and 234943 transitions. Word has length 39 [2021-08-21 13:01:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:44,764 INFO L470 AbstractCegarLoop]: Abstraction has 53955 states and 234943 transitions. [2021-08-21 13:01:44,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 53955 states and 234943 transitions. [2021-08-21 13:01:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:44,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:44,903 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:44,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:45,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:45,104 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1009099990, now seen corresponding path program 39 times [2021-08-21 13:01:45,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:45,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651963388] [2021-08-21 13:01:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:45,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:45,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:45,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651963388] [2021-08-21 13:01:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651963388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:45,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903863332] [2021-08-21 13:01:45,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:45,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:45,558 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:45,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:01:47,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 13:01:47,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:01:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:48,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-21 13:01:48,165 INFO L354 Elim1Store]: treesize reduction 62, result has 45.1 percent of original size [2021-08-21 13:01:48,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 76 [2021-08-21 13:01:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:48,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903863332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:48,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:48,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:01:48,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519554034] [2021-08-21 13:01:48,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:01:48,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:01:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:01:48,385 INFO L87 Difference]: Start difference. First operand 53955 states and 234943 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:53,510 INFO L93 Difference]: Finished difference Result 187198 states and 785415 transitions. [2021-08-21 13:01:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 13:01:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:01:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:54,747 INFO L225 Difference]: With dead ends: 187198 [2021-08-21 13:01:54,747 INFO L226 Difference]: Without dead ends: 184787 [2021-08-21 13:01:54,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 3002.0ms TimeCoverageRelationStatistics Valid=1135, Invalid=6521, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 13:01:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184787 states. [2021-08-21 13:01:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184787 to 65070. [2021-08-21 13:01:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65070 states, 65069 states have (on average 4.377322534540257) internal successors, (284828), 65069 states have internal predecessors, (284828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65070 states to 65070 states and 284828 transitions. [2021-08-21 13:01:58,906 INFO L78 Accepts]: Start accepts. Automaton has 65070 states and 284828 transitions. Word has length 39 [2021-08-21 13:01:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:58,906 INFO L470 AbstractCegarLoop]: Abstraction has 65070 states and 284828 transitions. [2021-08-21 13:01:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 65070 states and 284828 transitions. [2021-08-21 13:01:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:01:59,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:59,070 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:59,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:59,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 13:01:59,270 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:01:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1711426134, now seen corresponding path program 40 times [2021-08-21 13:01:59,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:59,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951656777] [2021-08-21 13:01:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:59,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:59,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:59,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951656777] [2021-08-21 13:01:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951656777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:59,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087507434] [2021-08-21 13:01:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:59,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:59,431 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:02:01,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:02:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:02:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:02,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 13:02:02,443 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:02:02,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:02:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087507434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:02,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:02,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:02:02,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225072595] [2021-08-21 13:02:02,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:02:02,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:02:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:02:02,481 INFO L87 Difference]: Start difference. First operand 65070 states and 284828 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:05,738 INFO L93 Difference]: Finished difference Result 151680 states and 647112 transitions. [2021-08-21 13:02:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:02:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:02:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:06,557 INFO L225 Difference]: With dead ends: 151680 [2021-08-21 13:02:06,557 INFO L226 Difference]: Without dead ends: 150933 [2021-08-21 13:02:06,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1328.7ms TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:02:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150933 states. [2021-08-21 13:02:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150933 to 69032. [2021-08-21 13:02:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69032 states, 69031 states have (on average 4.3882458605554024) internal successors, (302925), 69031 states have internal predecessors, (302925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69032 states to 69032 states and 302925 transitions. [2021-08-21 13:02:10,042 INFO L78 Accepts]: Start accepts. Automaton has 69032 states and 302925 transitions. Word has length 39 [2021-08-21 13:02:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:10,043 INFO L470 AbstractCegarLoop]: Abstraction has 69032 states and 302925 transitions. [2021-08-21 13:02:10,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 69032 states and 302925 transitions. [2021-08-21 13:02:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:02:10,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:10,228 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:10,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 13:02:10,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:02:10,429 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:02:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:10,429 INFO L82 PathProgramCache]: Analyzing trace with hash -40119278, now seen corresponding path program 41 times [2021-08-21 13:02:10,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:10,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337647575] [2021-08-21 13:02:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:10,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:10,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:10,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337647575] [2021-08-21 13:02:10,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337647575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:10,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435971399] [2021-08-21 13:02:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:02:10,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:10,942 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:10,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:02:13,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:02:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:02:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:13,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-21 13:02:13,682 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 13:02:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 50 [2021-08-21 13:02:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435971399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:13,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:13,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:02:13,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855008186] [2021-08-21 13:02:13,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:02:13,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:02:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:02:13,830 INFO L87 Difference]: Start difference. First operand 69032 states and 302925 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:18,627 INFO L93 Difference]: Finished difference Result 223482 states and 952047 transitions. [2021-08-21 13:02:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 13:02:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:02:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:20,162 INFO L225 Difference]: With dead ends: 223482 [2021-08-21 13:02:20,162 INFO L226 Difference]: Without dead ends: 221540 [2021-08-21 13:02:20,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=912, Invalid=4490, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 13:02:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221540 states. [2021-08-21 13:02:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221540 to 84173. [2021-08-21 13:02:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84173 states, 84172 states have (on average 4.423062301002709) internal successors, (372298), 84172 states have internal predecessors, (372298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84173 states to 84173 states and 372298 transitions. [2021-08-21 13:02:25,253 INFO L78 Accepts]: Start accepts. Automaton has 84173 states and 372298 transitions. Word has length 39 [2021-08-21 13:02:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:25,253 INFO L470 AbstractCegarLoop]: Abstraction has 84173 states and 372298 transitions. [2021-08-21 13:02:25,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84173 states and 372298 transitions. [2021-08-21 13:02:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:02:25,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:25,788 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:25,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:25,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:25,989 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:02:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1957982250, now seen corresponding path program 42 times [2021-08-21 13:02:25,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:25,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6529680] [2021-08-21 13:02:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:25,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:26,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:26,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6529680] [2021-08-21 13:02:26,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6529680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:26,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653268466] [2021-08-21 13:02:26,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:26,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:26,156 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:26,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:02:28,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:02:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:02:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 13:02:28,980 INFO L354 Elim1Store]: treesize reduction 56, result has 46.7 percent of original size [2021-08-21 13:02:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 97 [2021-08-21 13:02:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653268466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:29,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:02:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672923034] [2021-08-21 13:02:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:02:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:02:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:02:29,407 INFO L87 Difference]: Start difference. First operand 84173 states and 372298 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:34,913 INFO L93 Difference]: Finished difference Result 189589 states and 814999 transitions. [2021-08-21 13:02:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 13:02:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:02:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:36,332 INFO L225 Difference]: With dead ends: 189589 [2021-08-21 13:02:36,333 INFO L226 Difference]: Without dead ends: 188753 [2021-08-21 13:02:36,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2934.3ms TimeCoverageRelationStatistics Valid=1149, Invalid=5171, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 13:02:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188753 states. [2021-08-21 13:02:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188753 to 83573. [2021-08-21 13:02:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83573 states, 83572 states have (on average 4.423000526492126) internal successors, (369639), 83572 states have internal predecessors, (369639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83573 states to 83573 states and 369639 transitions. [2021-08-21 13:02:40,991 INFO L78 Accepts]: Start accepts. Automaton has 83573 states and 369639 transitions. Word has length 39 [2021-08-21 13:02:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:40,991 INFO L470 AbstractCegarLoop]: Abstraction has 83573 states and 369639 transitions. [2021-08-21 13:02:40,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 83573 states and 369639 transitions. [2021-08-21 13:02:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:02:41,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:41,203 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:41,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:41,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:02:41,405 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:02:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 977478734, now seen corresponding path program 43 times [2021-08-21 13:02:41,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:41,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128415430] [2021-08-21 13:02:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:41,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:41,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:41,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128415430] [2021-08-21 13:02:41,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128415430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:41,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154127262] [2021-08-21 13:02:41,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:02:41,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:41,563 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:41,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:02:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:43,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:02:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:44,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 13:02:44,634 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:02:44,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:02:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154127262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:44,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:44,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:02:44,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479577769] [2021-08-21 13:02:44,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:02:44,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:02:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:02:44,672 INFO L87 Difference]: Start difference. First operand 83573 states and 369639 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:46,899 INFO L93 Difference]: Finished difference Result 150144 states and 646077 transitions. [2021-08-21 13:02:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:02:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:02:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:47,910 INFO L225 Difference]: With dead ends: 150144 [2021-08-21 13:02:47,910 INFO L226 Difference]: Without dead ends: 150038 [2021-08-21 13:02:47,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 733.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:02:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150038 states. [2021-08-21 13:02:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150038 to 83843. [2021-08-21 13:02:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83843 states, 83842 states have (on average 4.424572410009303) internal successors, (370965), 83842 states have internal predecessors, (370965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83843 states to 83843 states and 370965 transitions. [2021-08-21 13:02:51,256 INFO L78 Accepts]: Start accepts. Automaton has 83843 states and 370965 transitions. Word has length 39 [2021-08-21 13:02:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:51,257 INFO L470 AbstractCegarLoop]: Abstraction has 83843 states and 370965 transitions. [2021-08-21 13:02:51,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83843 states and 370965 transitions. [2021-08-21 13:02:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:02:51,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:51,859 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:51,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 13:02:52,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:52,061 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:02:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1664266277, now seen corresponding path program 44 times [2021-08-21 13:02:52,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:52,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704393876] [2021-08-21 13:02:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:52,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 13:02:52,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:52,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704393876] [2021-08-21 13:02:52,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704393876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:52,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718293865] [2021-08-21 13:02:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:02:52,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:52,135 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:52,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:02:54,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:02:54,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:02:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 13:02:54,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718293865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:54,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:54,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 13:02:54,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876638151] [2021-08-21 13:02:54,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:02:54,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:02:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:02:54,751 INFO L87 Difference]: Start difference. First operand 83843 states and 370965 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:56,961 INFO L93 Difference]: Finished difference Result 216765 states and 917271 transitions. [2021-08-21 13:02:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:02:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:02:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:58,427 INFO L225 Difference]: With dead ends: 216765 [2021-08-21 13:02:58,427 INFO L226 Difference]: Without dead ends: 216023 [2021-08-21 13:02:58,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:02:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216023 states. [2021-08-21 13:03:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216023 to 117079. [2021-08-21 13:03:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117079 states, 117078 states have (on average 4.582321187584346) internal successors, (536489), 117078 states have internal predecessors, (536489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117079 states to 117079 states and 536489 transitions. [2021-08-21 13:03:04,264 INFO L78 Accepts]: Start accepts. Automaton has 117079 states and 536489 transitions. Word has length 39 [2021-08-21 13:03:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:04,264 INFO L470 AbstractCegarLoop]: Abstraction has 117079 states and 536489 transitions. [2021-08-21 13:03:04,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 117079 states and 536489 transitions. [2021-08-21 13:03:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:03:04,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:04,606 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:04,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 13:03:04,806 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:03:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1779012645, now seen corresponding path program 45 times [2021-08-21 13:03:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:04,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918053977] [2021-08-21 13:03:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:04,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:03:04,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:04,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918053977] [2021-08-21 13:03:04,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918053977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:04,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312801885] [2021-08-21 13:03:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:03:04,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:04,848 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:04,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:03:07,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:03:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:07,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:03:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:03:07,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312801885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:07,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:07,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 13:03:07,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784778484] [2021-08-21 13:03:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:03:07,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:03:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:03:07,635 INFO L87 Difference]: Start difference. First operand 117079 states and 536489 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:10,429 INFO L93 Difference]: Finished difference Result 256120 states and 1091559 transitions. [2021-08-21 13:03:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:03:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:03:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:12,768 INFO L225 Difference]: With dead ends: 256120 [2021-08-21 13:03:12,768 INFO L226 Difference]: Without dead ends: 246581 [2021-08-21 13:03:12,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246581 states. [2021-08-21 13:03:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246581 to 130502. [2021-08-21 13:03:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130502 states, 130501 states have (on average 4.56508379246136) internal successors, (595748), 130501 states have internal predecessors, (595748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130502 states to 130502 states and 595748 transitions. [2021-08-21 13:03:19,803 INFO L78 Accepts]: Start accepts. Automaton has 130502 states and 595748 transitions. Word has length 39 [2021-08-21 13:03:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:19,803 INFO L470 AbstractCegarLoop]: Abstraction has 130502 states and 595748 transitions. [2021-08-21 13:03:19,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 130502 states and 595748 transitions. [2021-08-21 13:03:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:03:20,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:20,504 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:20,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:20,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 13:03:20,704 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:03:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash -759533488, now seen corresponding path program 46 times [2021-08-21 13:03:20,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:20,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129327252] [2021-08-21 13:03:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:20,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:20,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129327252] [2021-08-21 13:03:20,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129327252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982745994] [2021-08-21 13:03:20,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:03:20,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:20,836 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:03:23,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:03:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:03:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:23,828 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:03:23,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-08-21 13:03:23,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:03:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982745994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:23,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:23,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:03:23,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192721700] [2021-08-21 13:03:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:03:23,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:03:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:03:23,942 INFO L87 Difference]: Start difference. First operand 130502 states and 595748 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:27,228 INFO L93 Difference]: Finished difference Result 204392 states and 915163 transitions. [2021-08-21 13:03:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:03:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:03:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:28,700 INFO L225 Difference]: With dead ends: 204392 [2021-08-21 13:03:28,701 INFO L226 Difference]: Without dead ends: 203865 [2021-08-21 13:03:28,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:03:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203865 states. [2021-08-21 13:03:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203865 to 138425. [2021-08-21 13:03:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138425 states, 138424 states have (on average 4.564981506097209) internal successors, (631903), 138424 states have internal predecessors, (631903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138425 states to 138425 states and 631903 transitions. [2021-08-21 13:03:34,728 INFO L78 Accepts]: Start accepts. Automaton has 138425 states and 631903 transitions. Word has length 39 [2021-08-21 13:03:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:34,728 INFO L470 AbstractCegarLoop]: Abstraction has 138425 states and 631903 transitions. [2021-08-21 13:03:34,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 138425 states and 631903 transitions. [2021-08-21 13:03:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:03:35,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:35,141 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 13:03:35,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:35,342 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:03:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1657677458, now seen corresponding path program 47 times [2021-08-21 13:03:35,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:35,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865834230] [2021-08-21 13:03:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:35,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:35,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:35,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865834230] [2021-08-21 13:03:35,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865834230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:35,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114551523] [2021-08-21 13:03:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:03:35,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:35,725 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:35,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:03:38,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:03:38,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:03:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-08-21 13:03:39,242 INFO L354 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2021-08-21 13:03:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 36 [2021-08-21 13:03:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:39,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114551523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:39,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:39,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:03:39,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655083731] [2021-08-21 13:03:39,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:03:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:03:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:03:39,280 INFO L87 Difference]: Start difference. First operand 138425 states and 631903 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:43,980 INFO L93 Difference]: Finished difference Result 231440 states and 1033800 transitions. [2021-08-21 13:03:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:03:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:03:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:46,670 INFO L225 Difference]: With dead ends: 231440 [2021-08-21 13:03:46,671 INFO L226 Difference]: Without dead ends: 230922 [2021-08-21 13:03:46,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1326.2ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:03:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230922 states. [2021-08-21 13:03:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230922 to 131020. [2021-08-21 13:03:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131020 states, 131019 states have (on average 4.569169357116143) internal successors, (598648), 131019 states have internal predecessors, (598648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131020 states to 131020 states and 598648 transitions. [2021-08-21 13:03:54,051 INFO L78 Accepts]: Start accepts. Automaton has 131020 states and 598648 transitions. Word has length 39 [2021-08-21 13:03:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:54,051 INFO L470 AbstractCegarLoop]: Abstraction has 131020 states and 598648 transitions. [2021-08-21 13:03:54,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 131020 states and 598648 transitions. [2021-08-21 13:03:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:03:54,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:54,451 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:54,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:54,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:54,652 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:03:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1704764732, now seen corresponding path program 48 times [2021-08-21 13:03:54,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:54,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813762637] [2021-08-21 13:03:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:54,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:55,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:55,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813762637] [2021-08-21 13:03:55,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813762637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:55,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683291851] [2021-08-21 13:03:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:03:55,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:55,071 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:55,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:03:57,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:03:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:03:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:58,004 INFO L354 Elim1Store]: treesize reduction 22, result has 77.3 percent of original size [2021-08-21 13:03:58,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 129 [2021-08-21 13:03:59,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-08-21 13:03:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:59,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683291851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:59,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:59,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:03:59,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612668571] [2021-08-21 13:03:59,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:03:59,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:03:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:03:59,161 INFO L87 Difference]: Start difference. First operand 131020 states and 598648 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:05,113 INFO L93 Difference]: Finished difference Result 311646 states and 1382091 transitions. [2021-08-21 13:04:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:04:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:04:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:07,628 INFO L225 Difference]: With dead ends: 311646 [2021-08-21 13:04:07,628 INFO L226 Difference]: Without dead ends: 311177 [2021-08-21 13:04:07,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2295.4ms TimeCoverageRelationStatistics Valid=790, Invalid=4040, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 13:04:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311177 states. [2021-08-21 13:04:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311177 to 141443. [2021-08-21 13:04:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141443 states, 141442 states have (on average 4.5710962797471755) internal successors, (646545), 141442 states have internal predecessors, (646545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141443 states to 141443 states and 646545 transitions. [2021-08-21 13:04:15,533 INFO L78 Accepts]: Start accepts. Automaton has 141443 states and 646545 transitions. Word has length 39 [2021-08-21 13:04:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:15,533 INFO L470 AbstractCegarLoop]: Abstraction has 141443 states and 646545 transitions. [2021-08-21 13:04:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 141443 states and 646545 transitions. [2021-08-21 13:04:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:04:16,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:16,265 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:16,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 13:04:16,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:16,466 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:04:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1635064594, now seen corresponding path program 49 times [2021-08-21 13:04:16,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:16,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154396683] [2021-08-21 13:04:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:16,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:16,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:16,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154396683] [2021-08-21 13:04:16,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154396683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:16,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295006587] [2021-08-21 13:04:16,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:04:16,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:16,627 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:16,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:04:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:04:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:19,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-08-21 13:04:19,959 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:04:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:04:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:19,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295006587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:19,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:19,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:04:19,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457427092] [2021-08-21 13:04:19,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:04:19,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:04:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:04:19,995 INFO L87 Difference]: Start difference. First operand 141443 states and 646545 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:23,299 INFO L93 Difference]: Finished difference Result 213372 states and 956804 transitions. [2021-08-21 13:04:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:04:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:04:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:24,850 INFO L225 Difference]: With dead ends: 213372 [2021-08-21 13:04:24,850 INFO L226 Difference]: Without dead ends: 213077 [2021-08-21 13:04:24,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 914.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:04:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213077 states. [2021-08-21 13:04:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213077 to 142816. [2021-08-21 13:04:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142816 states, 142815 states have (on average 4.573322130028358) internal successors, (653139), 142815 states have internal predecessors, (653139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142816 states to 142816 states and 653139 transitions. [2021-08-21 13:04:31,586 INFO L78 Accepts]: Start accepts. Automaton has 142816 states and 653139 transitions. Word has length 39 [2021-08-21 13:04:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 142816 states and 653139 transitions. [2021-08-21 13:04:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 142816 states and 653139 transitions. [2021-08-21 13:04:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:04:32,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:32,029 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:32,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 13:04:32,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 13:04:32,229 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:04:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -505512536, now seen corresponding path program 50 times [2021-08-21 13:04:32,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:32,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468769746] [2021-08-21 13:04:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:32,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:32,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:32,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468769746] [2021-08-21 13:04:32,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468769746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:32,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667311111] [2021-08-21 13:04:32,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:04:32,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:32,425 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:32,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:04:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:04:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:04:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:35,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-21 13:04:35,789 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:04:35,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2021-08-21 13:04:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:35,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667311111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:35,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:35,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 13:04:35,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870794499] [2021-08-21 13:04:35,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:04:35,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:04:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:04:35,835 INFO L87 Difference]: Start difference. First operand 142816 states and 653139 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:39,441 INFO L93 Difference]: Finished difference Result 231398 states and 1034792 transitions. [2021-08-21 13:04:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:04:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:04:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:41,145 INFO L225 Difference]: With dead ends: 231398 [2021-08-21 13:04:41,145 INFO L226 Difference]: Without dead ends: 231175 [2021-08-21 13:04:41,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 876.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:04:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231175 states. [2021-08-21 13:04:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231175 to 142455. [2021-08-21 13:04:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142455 states, 142454 states have (on average 4.57134934785966) internal successors, (651207), 142454 states have internal predecessors, (651207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142455 states to 142455 states and 651207 transitions. [2021-08-21 13:04:47,826 INFO L78 Accepts]: Start accepts. Automaton has 142455 states and 651207 transitions. Word has length 39 [2021-08-21 13:04:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:47,826 INFO L470 AbstractCegarLoop]: Abstraction has 142455 states and 651207 transitions. [2021-08-21 13:04:47,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 142455 states and 651207 transitions. [2021-08-21 13:04:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:04:48,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:48,579 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:48,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:04:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:04:48,779 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:04:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash -537133792, now seen corresponding path program 51 times [2021-08-21 13:04:48,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:48,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742757128] [2021-08-21 13:04:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:48,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:48,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:48,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742757128] [2021-08-21 13:04:48,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742757128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:48,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499118303] [2021-08-21 13:04:48,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:04:48,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:48,939 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:48,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:04:51,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:04:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:04:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 13:04:52,340 INFO L354 Elim1Store]: treesize reduction 14, result has 77.0 percent of original size [2021-08-21 13:04:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 82 [2021-08-21 13:04:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:52,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499118303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:52,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:04:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397543207] [2021-08-21 13:04:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:04:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:52,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:04:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:04:52,509 INFO L87 Difference]: Start difference. First operand 142455 states and 651207 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:59,732 INFO L93 Difference]: Finished difference Result 316985 states and 1410605 transitions. [2021-08-21 13:04:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 13:04:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:04:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:05:02,474 INFO L225 Difference]: With dead ends: 316985 [2021-08-21 13:05:02,475 INFO L226 Difference]: Without dead ends: 316773 [2021-08-21 13:05:02,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 2160.7ms TimeCoverageRelationStatistics Valid=837, Invalid=4275, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 13:05:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316773 states. [2021-08-21 13:05:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316773 to 141967. [2021-08-21 13:05:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141967 states, 141966 states have (on average 4.574665765042334) internal successors, (649447), 141966 states have internal predecessors, (649447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141967 states to 141967 states and 649447 transitions. [2021-08-21 13:05:11,838 INFO L78 Accepts]: Start accepts. Automaton has 141967 states and 649447 transitions. Word has length 39 [2021-08-21 13:05:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:05:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 141967 states and 649447 transitions. [2021-08-21 13:05:11,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 141967 states and 649447 transitions. [2021-08-21 13:05:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:05:12,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:05:12,573 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:05:12,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 13:05:12,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:12,774 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:05:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:05:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2069768318, now seen corresponding path program 52 times [2021-08-21 13:05:12,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:05:12,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776236501] [2021-08-21 13:05:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:05:12,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:05:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:05:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:12,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:05:12,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776236501] [2021-08-21 13:05:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776236501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:12,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054714138] [2021-08-21 13:05:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:05:12,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:05:12,947 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:05:12,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:05:15,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:05:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:05:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:05:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:05:16,331 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 13:05:16,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-08-21 13:05:16,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 13:05:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054714138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:16,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:05:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 13:05:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482986588] [2021-08-21 13:05:16,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:05:16,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:05:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:05:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:05:16,454 INFO L87 Difference]: Start difference. First operand 141967 states and 649447 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:05:19,673 INFO L93 Difference]: Finished difference Result 203073 states and 916833 transitions. [2021-08-21 13:05:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:05:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:05:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:05:21,205 INFO L225 Difference]: With dead ends: 203073 [2021-08-21 13:05:21,205 INFO L226 Difference]: Without dead ends: 202860 [2021-08-21 13:05:21,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:05:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202860 states. [2021-08-21 13:05:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202860 to 150505. [2021-08-21 13:05:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150505 states, 150504 states have (on average 4.577160739913889) internal successors, (688881), 150504 states have internal predecessors, (688881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150505 states to 150505 states and 688881 transitions. [2021-08-21 13:05:27,690 INFO L78 Accepts]: Start accepts. Automaton has 150505 states and 688881 transitions. Word has length 39 [2021-08-21 13:05:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:05:27,691 INFO L470 AbstractCegarLoop]: Abstraction has 150505 states and 688881 transitions. [2021-08-21 13:05:27,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 150505 states and 688881 transitions. [2021-08-21 13:05:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:05:28,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:05:28,119 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:05:28,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:05:28,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:28,320 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:05:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:05:28,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1270061008, now seen corresponding path program 53 times [2021-08-21 13:05:28,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:05:28,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232259682] [2021-08-21 13:05:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:05:28,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:05:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:05:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:28,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:05:28,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232259682] [2021-08-21 13:05:28,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232259682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:28,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541185220] [2021-08-21 13:05:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:05:28,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:05:28,727 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:05:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:05:31,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:05:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:05:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:05:31,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:05:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-08-21 13:05:32,292 INFO L354 Elim1Store]: treesize reduction 110, result has 35.7 percent of original size [2021-08-21 13:05:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 102 [2021-08-21 13:05:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541185220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:32,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:05:32,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:05:32,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752573962] [2021-08-21 13:05:32,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:05:32,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:05:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:05:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:05:32,548 INFO L87 Difference]: Start difference. First operand 150505 states and 688881 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:05:37,210 INFO L93 Difference]: Finished difference Result 291079 states and 1311667 transitions. [2021-08-21 13:05:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:05:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:05:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:05:39,821 INFO L225 Difference]: With dead ends: 291079 [2021-08-21 13:05:39,822 INFO L226 Difference]: Without dead ends: 290595 [2021-08-21 13:05:39,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1115.1ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:05:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290595 states. [2021-08-21 13:05:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290595 to 175360. [2021-08-21 13:05:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175360 states, 175359 states have (on average 4.6127087859761975) internal successors, (808880), 175359 states have internal predecessors, (808880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175360 states to 175360 states and 808880 transitions. [2021-08-21 13:05:48,869 INFO L78 Accepts]: Start accepts. Automaton has 175360 states and 808880 transitions. Word has length 39 [2021-08-21 13:05:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:05:48,869 INFO L470 AbstractCegarLoop]: Abstraction has 175360 states and 808880 transitions. [2021-08-21 13:05:48,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:05:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 175360 states and 808880 transitions. [2021-08-21 13:05:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:05:49,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:05:49,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:05:49,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 13:05:49,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:49,949 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 13:05:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:05:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1779858218, now seen corresponding path program 54 times [2021-08-21 13:05:49,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:05:49,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009903594] [2021-08-21 13:05:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:05:49,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:05:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:05:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:50,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:05:50,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009903594] [2021-08-21 13:05:50,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009903594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:50,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378596534] [2021-08-21 13:05:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:05:50,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:05:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:05:50,129 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:05:50,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:05:53,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:05:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:05:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:05:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:05:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-21 13:05:53,892 INFO L354 Elim1Store]: treesize reduction 56, result has 46.7 percent of original size [2021-08-21 13:05:53,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 94 [2021-08-21 13:05:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:05:54,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378596534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:05:54,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:05:54,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:05:54,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686375450] [2021-08-21 13:05:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:05:54,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:05:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:05:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:05:54,105 INFO L87 Difference]: Start difference. First operand 175360 states and 808880 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:06:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:06:01,482 INFO L93 Difference]: Finished difference Result 382757 states and 1713346 transitions. [2021-08-21 13:06:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:06:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 13:06:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:06:04,236 INFO L225 Difference]: With dead ends: 382757 [2021-08-21 13:06:04,236 INFO L226 Difference]: Without dead ends: 381768 [2021-08-21 13:06:04,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2060.4ms TimeCoverageRelationStatistics Valid=616, Invalid=3940, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:06:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381768 states. [2021-08-21 13:06:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381768 to 171200. [2021-08-21 13:06:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171200 states, 171199 states have (on average 4.612538624641499) internal successors, (789662), 171199 states have internal predecessors, (789662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)