/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:51:42,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:51:42,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:51:42,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:51:42,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:51:42,593 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:51:42,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:51:42,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:51:42,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:51:42,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:51:42,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:51:42,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:51:42,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:51:42,594 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:51:42,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:51:42,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:51:42,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:51:42,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:51:42,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:51:42,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:51:42,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:51:42,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:51:42,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:51:42,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:51:42,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:51:42,598 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:51:42,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:51:42,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:51:42,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:51:42,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:51:42,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:51:42,776 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:51:42,777 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:51:42,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2022-03-03 19:51:42,778 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2022-03-03 19:51:42,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:51:42,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:51:42,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:51:42,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:51:42,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:51:42,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,827 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:51:42,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:51:42,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:51:42,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:51:42,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:51:42,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:51:42,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:51:42,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:51:42,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:51:42,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/1) ... [2022-03-03 19:51:42,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:51:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:42,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:51:42,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:51:42,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:51:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:51:42,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:51:42,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:51:42,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:51:42,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:51:42,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:51:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:51:42,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:51:42,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:51:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:51:42,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:51:42,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 19:51:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 19:51:42,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 19:51:42,903 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:51:42,934 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:51:42,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:51:43,036 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:51:43,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:51:43,061 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:51:43,063 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:51:43 BoogieIcfgContainer [2022-03-03 19:51:43,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:51:43,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:51:43,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:51:43,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:51:43,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:51:42" (1/2) ... [2022-03-03 19:51:43,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24083e79 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:51:43, skipping insertion in model container [2022-03-03 19:51:43,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:51:43" (2/2) ... [2022-03-03 19:51:43,090 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2022-03-03 19:51:43,093 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:51:43,093 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:51:43,093 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:51:43,093 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:51:43,126 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-03 19:51:43,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:51:43,160 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:51:43,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-03 19:51:43,168 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-03 19:51:43,244 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) [2022-03-03 19:51:43,247 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) [2022-03-03 19:51:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:51:43,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:43,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:43,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-03-03 19:51:43,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:43,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134230814] [2022-03-03 19:51:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:43,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:43,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:43,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134230814] [2022-03-03 19:51:43,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134230814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:43,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:43,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:51:43,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397429200] [2022-03-03 19:51:43,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:43,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:51:43,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:51:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:51:43,408 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) [2022-03-03 19:51:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:43,471 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-03-03 19:51:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:51:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:51:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:43,498 INFO L225 Difference]: With dead ends: 1236 [2022-03-03 19:51:43,498 INFO L226 Difference]: Without dead ends: 1109 [2022-03-03 19:51:43,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:51:43,516 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:43,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:51:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-03 19:51:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-03-03 19:51:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-03-03 19:51:43,631 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-03-03 19:51:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-03-03 19:51:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-03-03 19:51:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:51:43,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:43,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:51:43,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-03-03 19:51:43,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:43,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121232718] [2022-03-03 19:51:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:43,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:43,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121232718] [2022-03-03 19:51:43,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121232718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:43,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:43,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:43,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442434556] [2022-03-03 19:51:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:43,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:43,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:43,712 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:43,793 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-03-03 19:51:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:51:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:51:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:43,801 INFO L225 Difference]: With dead ends: 1524 [2022-03-03 19:51:43,802 INFO L226 Difference]: Without dead ends: 1418 [2022-03-03 19:51:43,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:43,811 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:43,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-03-03 19:51:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-03-03 19:51:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-03-03 19:51:43,861 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-03-03 19:51:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:43,861 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-03-03 19:51:43,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-03-03 19:51:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:51:43,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:43,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:43,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:51:43,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-03-03 19:51:43,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:43,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557497012] [2022-03-03 19:51:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:43,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:43,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557497012] [2022-03-03 19:51:43,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557497012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:43,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:43,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:43,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870777894] [2022-03-03 19:51:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:43,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:43,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:43,925 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:44,001 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-03-03 19:51:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:51:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:51:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:44,011 INFO L225 Difference]: With dead ends: 2017 [2022-03-03 19:51:44,011 INFO L226 Difference]: Without dead ends: 1875 [2022-03-03 19:51:44,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:44,016 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:44,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-03 19:51:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-03-03 19:51:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-03-03 19:51:44,064 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-03-03 19:51:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:44,064 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-03-03 19:51:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-03-03 19:51:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:51:44,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:44,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:51:44,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-03-03 19:51:44,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:44,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000176275] [2022-03-03 19:51:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:44,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:44,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000176275] [2022-03-03 19:51:44,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000176275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:44,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788113212] [2022-03-03 19:51:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:44,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:44,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:44,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:44,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:51:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:51:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:44,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:44,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788113212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:44,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:44,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-03 19:51:44,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842549536] [2022-03-03 19:51:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:44,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:51:44,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:51:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:51:44,402 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:44,571 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-03-03 19:51:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:51:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:51:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:44,583 INFO L225 Difference]: With dead ends: 2308 [2022-03-03 19:51:44,584 INFO L226 Difference]: Without dead ends: 2108 [2022-03-03 19:51:44,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:51:44,587 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:44,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-03-03 19:51:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-03-03 19:51:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-03-03 19:51:44,626 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-03-03 19:51:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:44,626 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-03-03 19:51:44,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-03-03 19:51:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:51:44,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:44,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:44,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:44,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:44,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-03-03 19:51:44,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:44,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547094775] [2022-03-03 19:51:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:44,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:44,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547094775] [2022-03-03 19:51:44,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547094775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:44,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:44,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:44,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375253714] [2022-03-03 19:51:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:44,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:44,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:44,885 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:44,975 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-03-03 19:51:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:51:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:51:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:44,983 INFO L225 Difference]: With dead ends: 1950 [2022-03-03 19:51:44,983 INFO L226 Difference]: Without dead ends: 1860 [2022-03-03 19:51:44,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:44,986 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:44,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-03 19:51:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-03-03 19:51:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-03-03 19:51:45,022 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-03-03 19:51:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:45,023 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-03-03 19:51:45,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-03-03 19:51:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:51:45,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:45,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:45,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:51:45,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-03-03 19:51:45,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153662879] [2022-03-03 19:51:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:45,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153662879] [2022-03-03 19:51:45,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153662879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:45,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:45,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:45,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347318302] [2022-03-03 19:51:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:45,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:45,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:45,076 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:45,148 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-03-03 19:51:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:51:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:51:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:45,155 INFO L225 Difference]: With dead ends: 1308 [2022-03-03 19:51:45,155 INFO L226 Difference]: Without dead ends: 1308 [2022-03-03 19:51:45,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:45,156 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:45,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-03 19:51:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-03-03 19:51:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-03-03 19:51:45,199 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-03-03 19:51:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:45,199 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-03-03 19:51:45,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-03-03 19:51:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:51:45,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:45,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:45,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:51:45,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-03-03 19:51:45,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987330383] [2022-03-03 19:51:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:45,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987330383] [2022-03-03 19:51:45,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987330383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:45,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:45,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:45,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996194307] [2022-03-03 19:51:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:45,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:45,249 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:45,297 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-03-03 19:51:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:51:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:51:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:45,302 INFO L225 Difference]: With dead ends: 1142 [2022-03-03 19:51:45,302 INFO L226 Difference]: Without dead ends: 1120 [2022-03-03 19:51:45,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:45,303 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:45,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:51:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-03 19:51:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-03-03 19:51:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-03-03 19:51:45,323 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-03-03 19:51:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:45,323 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-03-03 19:51:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-03-03 19:51:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:45,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:45,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:45,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:51:45,326 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-03-03 19:51:45,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131504932] [2022-03-03 19:51:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:45,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131504932] [2022-03-03 19:51:45,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131504932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:45,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:45,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:51:45,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806281789] [2022-03-03 19:51:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:45,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:45,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:45,360 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:45,397 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-03-03 19:51:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:51:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:45,404 INFO L225 Difference]: With dead ends: 1334 [2022-03-03 19:51:45,404 INFO L226 Difference]: Without dead ends: 1334 [2022-03-03 19:51:45,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:51:45,404 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:45,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:51:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-03-03 19:51:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-03-03 19:51:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-03-03 19:51:45,428 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-03-03 19:51:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:45,429 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-03-03 19:51:45,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-03-03 19:51:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:51:45,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:45,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:45,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 19:51:45,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:45,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-03-03 19:51:45,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863302962] [2022-03-03 19:51:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:45,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863302962] [2022-03-03 19:51:45,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863302962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:45,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338260174] [2022-03-03 19:51:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:45,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:45,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:51:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:51:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:45,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:51:45,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338260174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:45,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:51:45,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-03 19:51:45,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030696825] [2022-03-03 19:51:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:51:45,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:51:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:45,540 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:45,571 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-03-03 19:51:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:51:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:51:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:45,589 INFO L225 Difference]: With dead ends: 1658 [2022-03-03 19:51:45,589 INFO L226 Difference]: Without dead ends: 1658 [2022-03-03 19:51:45,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:45,591 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:45,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:51:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-03-03 19:51:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-03-03 19:51:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-03-03 19:51:45,615 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-03-03 19:51:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:45,615 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-03-03 19:51:45,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-03-03 19:51:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:45,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:45,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:45,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:45,830 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,SelfDestructingSolverStorable8 [2022-03-03 19:51:45,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-03-03 19:51:45,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925155123] [2022-03-03 19:51:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:45,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925155123] [2022-03-03 19:51:45,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925155123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:45,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123595971] [2022-03-03 19:51:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:45,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:45,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:46,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:51:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:51:46,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:46,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:51:46,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-03-03 19:51:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:46,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:46,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:46,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-03-03 19:51:46,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:46,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:51:46,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:46,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:51:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:46,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123595971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:46,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:46,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:51:46,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126464843] [2022-03-03 19:51:46,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:46,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:46,481 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:46,620 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-03-03 19:51:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:51:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:51:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:46,627 INFO L225 Difference]: With dead ends: 2387 [2022-03-03 19:51:46,627 INFO L226 Difference]: Without dead ends: 2308 [2022-03-03 19:51:46,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:46,628 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:46,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-03-03 19:51:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-03-03 19:51:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-03-03 19:51:46,666 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-03-03 19:51:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:46,666 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-03-03 19:51:46,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-03-03 19:51:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:46,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:46,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:46,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:46,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:46,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-03-03 19:51:46,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:46,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330447679] [2022-03-03 19:51:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:46,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:46,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330447679] [2022-03-03 19:51:46,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330447679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:46,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566348816] [2022-03-03 19:51:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:46,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:46,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:51:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:51:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:47,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-03 19:51:47,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-03-03 19:51:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:47,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:47,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:47,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-03 19:51:47,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:47,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:51:47,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:47,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:51:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:47,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566348816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:47,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:47,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:51:47,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707982961] [2022-03-03 19:51:47,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:47,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:47,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:47,456 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:47,603 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-03-03 19:51:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:51:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 29 [2022-03-03 19:51:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:47,612 INFO L225 Difference]: With dead ends: 2792 [2022-03-03 19:51:47,612 INFO L226 Difference]: Without dead ends: 2713 [2022-03-03 19:51:47,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:47,613 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:47,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-03-03 19:51:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-03-03 19:51:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-03-03 19:51:47,652 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-03-03 19:51:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:47,652 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-03-03 19:51:47,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-03-03 19:51:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:47,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:47,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:47,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:47,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:47,867 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-03-03 19:51:47,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:47,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367168947] [2022-03-03 19:51:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:47,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:47,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367168947] [2022-03-03 19:51:47,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367168947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:47,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621488867] [2022-03-03 19:51:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:47,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:47,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:51:47,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:51:47,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:51:47,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:48,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-03 19:51:48,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:51:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:48,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:48,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:48,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-03 19:51:48,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:48,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:51:48,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:48,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:51:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:48,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621488867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:48,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:48,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:51:48,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642791620] [2022-03-03 19:51:48,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:48,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:48,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:48,368 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 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) [2022-03-03 19:51:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:48,495 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-03-03 19:51:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:51:48,496 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 29 [2022-03-03 19:51:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:48,503 INFO L225 Difference]: With dead ends: 2570 [2022-03-03 19:51:48,504 INFO L226 Difference]: Without dead ends: 2491 [2022-03-03 19:51:48,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:48,504 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:48,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-03-03 19:51:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-03-03 19:51:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-03-03 19:51:48,538 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-03-03 19:51:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:48,538 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-03-03 19:51:48,539 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) [2022-03-03 19:51:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-03-03 19:51:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:48,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:48,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:48,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-03 19:51:48,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 19:51:48,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-03-03 19:51:48,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:48,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750646312] [2022-03-03 19:51:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:48,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:48,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750646312] [2022-03-03 19:51:48,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750646312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:48,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451972490] [2022-03-03 19:51:48,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:48,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:48,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:48,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:51:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:51:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:48,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:51:48,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:51:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:49,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:49,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:51:49,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:49,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:51:49,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:49,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-03-03 19:51:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451972490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:49,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:49,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:51:49,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947499078] [2022-03-03 19:51:49,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:49,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:49,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:49,262 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:49,440 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2022-03-03 19:51:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:51:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:51:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:49,449 INFO L225 Difference]: With dead ends: 3006 [2022-03-03 19:51:49,449 INFO L226 Difference]: Without dead ends: 2927 [2022-03-03 19:51:49,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:51:49,450 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:49,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-03-03 19:51:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2022-03-03 19:51:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-03-03 19:51:49,525 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-03-03 19:51:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:49,525 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-03-03 19:51:49,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-03-03 19:51:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:49,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:49,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:49,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:49,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:49,735 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-03-03 19:51:49,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:49,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304480879] [2022-03-03 19:51:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:49,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:49,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304480879] [2022-03-03 19:51:49,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304480879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:49,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610067098] [2022-03-03 19:51:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:49,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:49,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:51:49,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:51:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:49,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-03 19:51:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-03 19:51:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:50,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:50,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:51:50,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:51:50,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:50,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-03 19:51:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:50,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610067098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:50,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:50,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:51:50,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406171837] [2022-03-03 19:51:50,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:50,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:51:50,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:51:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:51:50,230 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:50,411 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2022-03-03 19:51:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:51:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:51:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:50,418 INFO L225 Difference]: With dead ends: 2784 [2022-03-03 19:51:50,418 INFO L226 Difference]: Without dead ends: 2705 [2022-03-03 19:51:50,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:51:50,419 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:50,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 156 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-03 19:51:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2022-03-03 19:51:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-03-03 19:51:50,457 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-03-03 19:51:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:50,457 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-03-03 19:51:50,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-03-03 19:51:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:51:50,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:50,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:50,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:50,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:50,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-03-03 19:51:50,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:50,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198125692] [2022-03-03 19:51:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:50,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:50,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:50,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198125692] [2022-03-03 19:51:50,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198125692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:50,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227020851] [2022-03-03 19:51:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:50,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:50,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:51:50,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:51:50,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:51:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:50,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:51:50,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:51:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:51,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:51,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:51,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-03 19:51:51,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:51,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:51:51,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:51,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-03-03 19:51:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:51,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227020851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:51,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:51,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 19:51:51,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298189250] [2022-03-03 19:51:51,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:51,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:51:51,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:51:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:51:51,239 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:51,408 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2022-03-03 19:51:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:51:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 29 [2022-03-03 19:51:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:51,416 INFO L225 Difference]: With dead ends: 2657 [2022-03-03 19:51:51,416 INFO L226 Difference]: Without dead ends: 2578 [2022-03-03 19:51:51,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:51:51,416 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:51,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 124 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-03 19:51:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2022-03-03 19:51:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-03-03 19:51:51,454 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-03-03 19:51:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-03-03 19:51:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-03-03 19:51:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:51:51,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:51,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:51,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:51,671 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,SelfDestructingSolverStorable14 [2022-03-03 19:51:51,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-03-03 19:51:51,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:51,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532266258] [2022-03-03 19:51:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:51,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:51,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532266258] [2022-03-03 19:51:51,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532266258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:51,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351649923] [2022-03-03 19:51:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:51,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:51:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:51:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:51,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:51,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351649923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:51,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:51,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:51:51,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96630783] [2022-03-03 19:51:51,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:51,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:51:51,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:51:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:51:51,823 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:51,911 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-03-03 19:51:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:51:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:51:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:51,921 INFO L225 Difference]: With dead ends: 3472 [2022-03-03 19:51:51,921 INFO L226 Difference]: Without dead ends: 3318 [2022-03-03 19:51:51,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:51:51,922 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:51,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 67 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:51:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-03-03 19:51:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-03-03 19:51:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-03-03 19:51:51,971 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-03-03 19:51:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-03-03 19:51:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-03-03 19:51:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:51:51,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:51,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:52,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:52,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:51:52,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:52,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-03-03 19:51:52,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:52,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390136732] [2022-03-03 19:51:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:52,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:52,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390136732] [2022-03-03 19:51:52,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390136732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:51:52,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:51:52,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:51:52,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084154320] [2022-03-03 19:51:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:51:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:51:52,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:51:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:52,223 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:52,277 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-03-03 19:51:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:51:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:51:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:52,294 INFO L225 Difference]: With dead ends: 5761 [2022-03-03 19:51:52,294 INFO L226 Difference]: Without dead ends: 5510 [2022-03-03 19:51:52,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:51:52,295 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:52,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:51:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-03-03 19:51:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-03-03 19:51:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-03-03 19:51:52,393 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-03-03 19:51:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-03-03 19:51:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-03-03 19:51:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:52,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:52,404 INFO L514 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] [2022-03-03 19:51:52,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-03 19:51:52,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-03-03 19:51:52,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:52,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637903124] [2022-03-03 19:51:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:52,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:51:52,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:52,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637903124] [2022-03-03 19:51:52,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637903124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:52,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096148966] [2022-03-03 19:51:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:52,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:51:52,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:51:52,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:51:52,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:51:52,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096148966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:52,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:52,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:51:52,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268572861] [2022-03-03 19:51:52,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:52,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:51:52,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:51:52,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:51:52,599 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:52,963 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-03-03 19:51:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:51:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 [2022-03-03 19:51:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:53,005 INFO L225 Difference]: With dead ends: 17927 [2022-03-03 19:51:53,005 INFO L226 Difference]: Without dead ends: 15301 [2022-03-03 19:51:53,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:51:53,006 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:53,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-03-03 19:51:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-03-03 19:51:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-03-03 19:51:53,258 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-03-03 19:51:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-03-03 19:51:53,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-03-03 19:51:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:53,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:53,278 INFO L514 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] [2022-03-03 19:51:53,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:53,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:51:53,494 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-03-03 19:51:53,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:53,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263236915] [2022-03-03 19:51:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:53,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:53,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263236915] [2022-03-03 19:51:53,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263236915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:53,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63259085] [2022-03-03 19:51:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:53,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:53,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:53,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:51:53,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:53,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:53,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63259085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:53,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:53,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:51:53,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738068305] [2022-03-03 19:51:53,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:53,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:51:53,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:51:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:51:53,697 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:54,134 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-03-03 19:51:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:51:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 34 [2022-03-03 19:51:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:54,188 INFO L225 Difference]: With dead ends: 21371 [2022-03-03 19:51:54,189 INFO L226 Difference]: Without dead ends: 20932 [2022-03-03 19:51:54,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:51:54,190 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:54,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 81 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:51:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-03-03 19:51:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-03-03 19:51:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-03-03 19:51:54,692 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-03-03 19:51:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:54,692 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-03-03 19:51:54,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-03-03 19:51:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:54,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:54,737 INFO L514 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] [2022-03-03 19:51:54,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:54,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:54,938 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-03-03 19:51:54,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:54,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227557681] [2022-03-03 19:51:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:55,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:55,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227557681] [2022-03-03 19:51:55,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227557681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:55,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113265590] [2022-03-03 19:51:55,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:55,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:55,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:51:55,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:51:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:55,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:55,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113265590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:55,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:55,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:51:55,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871860605] [2022-03-03 19:51:55,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:55,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:51:55,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:51:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:51:55,205 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:55,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:55,599 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-03-03 19:51:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:51:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:51:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:55,656 INFO L225 Difference]: With dead ends: 20596 [2022-03-03 19:51:55,657 INFO L226 Difference]: Without dead ends: 20518 [2022-03-03 19:51:55,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:51:55,657 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-03-03 19:51:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-03-03 19:51:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-03-03 19:51:56,113 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-03-03 19:51:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:56,113 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-03-03 19:51:56,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-03-03 19:51:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:56,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:56,145 INFO L514 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] [2022-03-03 19:51:56,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:56,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:56,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-03-03 19:51:56,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:56,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496757108] [2022-03-03 19:51:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:56,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:56,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496757108] [2022-03-03 19:51:56,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496757108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:56,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562457878] [2022-03-03 19:51:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:56,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:56,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:51:56,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:51:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:56,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562457878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:56,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:56,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:51:56,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242734015] [2022-03-03 19:51:56,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:56,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:51:56,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:56,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:51:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:51:56,565 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:56,999 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-03-03 19:51:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:51:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 34 [2022-03-03 19:51:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:57,062 INFO L225 Difference]: With dead ends: 22733 [2022-03-03 19:51:57,062 INFO L226 Difference]: Without dead ends: 21028 [2022-03-03 19:51:57,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:51:57,063 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 88 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-03-03 19:51:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-03-03 19:51:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-03-03 19:51:57,506 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-03-03 19:51:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:57,506 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-03-03 19:51:57,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-03-03 19:51:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:57,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:57,537 INFO L514 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] [2022-03-03 19:51:57,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:57,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-03 19:51:57,738 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-03-03 19:51:57,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:57,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026080766] [2022-03-03 19:51:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:57,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:57,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026080766] [2022-03-03 19:51:57,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026080766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:57,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890983615] [2022-03-03 19:51:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:57,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:57,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:57,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:51:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:57,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:57,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:57,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890983615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:57,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:57,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:51:57,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291670884] [2022-03-03 19:51:57,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:57,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:51:57,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:51:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:51:57,921 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:58,448 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-03-03 19:51:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:51:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:51:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:58,543 INFO L225 Difference]: With dead ends: 31402 [2022-03-03 19:51:58,543 INFO L226 Difference]: Without dead ends: 31094 [2022-03-03 19:51:58,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:51:58,544 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 349 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:58,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 79 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:51:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-03-03 19:51:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-03-03 19:51:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-03-03 19:51:59,296 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-03-03 19:51:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:59,306 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-03-03 19:51:59,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-03-03 19:51:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:51:59,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:59,347 INFO L514 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] [2022-03-03 19:51:59,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:59,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:59,554 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:51:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-03-03 19:51:59,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:59,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343255003] [2022-03-03 19:51:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:59,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343255003] [2022-03-03 19:51:59,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343255003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491050173] [2022-03-03 19:51:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:59,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:59,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:51:59,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:51:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:51:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:51:59,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491050173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:59,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:59,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:51:59,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416960873] [2022-03-03 19:51:59,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:51:59,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:51:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:51:59,786 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:00,236 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-03-03 19:52:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:52:00,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 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 34 [2022-03-03 19:52:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:00,336 INFO L225 Difference]: With dead ends: 33709 [2022-03-03 19:52:00,336 INFO L226 Difference]: Without dead ends: 32656 [2022-03-03 19:52:00,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:52:00,337 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:00,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 112 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-03-03 19:52:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-03-03 19:52:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-03-03 19:52:01,105 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-03-03 19:52:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-03-03 19:52:01,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-03-03 19:52:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:01,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:01,159 INFO L514 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] [2022-03-03 19:52:01,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-03 19:52:01,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:01,365 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-03-03 19:52:01,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:01,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430672805] [2022-03-03 19:52:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:01,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:01,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430672805] [2022-03-03 19:52:01,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430672805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:01,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468054000] [2022-03-03 19:52:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:01,386 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:01,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:52:01,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:52:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:01,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:52:01,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468054000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:01,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:01,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:52:01,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361592195] [2022-03-03 19:52:01,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:52:01,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:52:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:01,549 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:02,160 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-03-03 19:52:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:52:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 [2022-03-03 19:52:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:02,299 INFO L225 Difference]: With dead ends: 31214 [2022-03-03 19:52:02,299 INFO L226 Difference]: Without dead ends: 31106 [2022-03-03 19:52:02,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:52:02,300 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:02,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 81 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-03-03 19:52:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-03-03 19:52:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-03-03 19:52:03,028 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-03-03 19:52:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:03,028 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-03-03 19:52:03,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-03-03 19:52:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:03,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:03,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:03,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 19:52:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:52:03,283 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-03-03 19:52:03,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:03,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584961935] [2022-03-03 19:52:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:03,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-03 19:52:03,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:03,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584961935] [2022-03-03 19:52:03,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584961935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:03,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806432344] [2022-03-03 19:52:03,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:03,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:03,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:03,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:03,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:52:03,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:03,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-03 19:52:03,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:52:03,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806432344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:03,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:52:03,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-03 19:52:03,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85550245] [2022-03-03 19:52:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:03,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:03,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:03,409 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:03,743 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-03-03 19:52:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:52:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:03,863 INFO L225 Difference]: With dead ends: 29524 [2022-03-03 19:52:03,863 INFO L226 Difference]: Without dead ends: 29524 [2022-03-03 19:52:03,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:03,864 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:03,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-03-03 19:52:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-03-03 19:52:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-03-03 19:52:04,460 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-03-03 19:52:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-03-03 19:52:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-03-03 19:52:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:04,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:04,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:04,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:04,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:04,709 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:04,709 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-03-03 19:52:04,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:04,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593385607] [2022-03-03 19:52:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:04,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:52:04,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:04,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593385607] [2022-03-03 19:52:04,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593385607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:04,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036930572] [2022-03-03 19:52:04,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:04,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:04,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:04,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:04,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:52:04,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:52:04,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:52:04,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:52:04,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036930572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:04,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:52:04,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-03 19:52:04,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470542357] [2022-03-03 19:52:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:04,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:52:04,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:52:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:04,826 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:05,166 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-03-03 19:52:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:52:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:52:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:05,261 INFO L225 Difference]: With dead ends: 30000 [2022-03-03 19:52:05,262 INFO L226 Difference]: Without dead ends: 30000 [2022-03-03 19:52:05,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:05,262 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:05,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-03-03 19:52:05,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-03-03 19:52:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-03-03 19:52:05,991 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-03-03 19:52:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:05,991 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-03-03 19:52:05,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-03-03 19:52:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:06,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:06,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:06,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:06,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:06,245 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-03-03 19:52:06,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:06,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916845700] [2022-03-03 19:52:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:06,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:06,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916845700] [2022-03-03 19:52:06,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916845700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:06,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292341032] [2022-03-03 19:52:06,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:06,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:06,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:06,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:06,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:52:06,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:52:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:06,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:06,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292341032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:06,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:06,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-03 19:52:06,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231311642] [2022-03-03 19:52:06,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:06,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:52:06,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:52:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:06,396 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-03-03 19:52:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:06,674 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-03-03 19:52:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:52:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2022-03-03 19:52:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:06,967 INFO L225 Difference]: With dead ends: 37294 [2022-03-03 19:52:06,967 INFO L226 Difference]: Without dead ends: 37294 [2022-03-03 19:52:06,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:06,968 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:06,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-03-03 19:52:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-03-03 19:52:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-03-03 19:52:07,898 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-03-03 19:52:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:07,898 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-03-03 19:52:07,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-03-03 19:52:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-03-03 19:52:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:08,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:08,017 INFO L514 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] [2022-03-03 19:52:08,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:08,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:08,217 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-03-03 19:52:08,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:08,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019620136] [2022-03-03 19:52:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:08,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:08,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019620136] [2022-03-03 19:52:08,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019620136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:08,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030294210] [2022-03-03 19:52:08,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:08,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:08,593 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:08,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:52:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:08,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:52:08,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:08,855 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:08,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:52:09,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:52:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:09,277 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:09,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-03-03 19:52:09,698 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:09,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:52:09,723 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:09,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:52:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:10,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030294210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:10,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:10,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:52:10,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610327403] [2022-03-03 19:52:10,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:10,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:52:10,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:52:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:52:10,139 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:12,412 INFO L93 Difference]: Finished difference Result 67293 states and 275148 transitions. [2022-03-03 19:52:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:52:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:52:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:12,845 INFO L225 Difference]: With dead ends: 67293 [2022-03-03 19:52:12,846 INFO L226 Difference]: Without dead ends: 67101 [2022-03-03 19:52:12,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:52:12,847 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 579 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:12,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 472 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:52:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67101 states. [2022-03-03 19:52:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67101 to 34913. [2022-03-03 19:52:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2022-03-03 19:52:14,013 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2022-03-03 19:52:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2022-03-03 19:52:14,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2022-03-03 19:52:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:14,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:14,089 INFO L514 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] [2022-03-03 19:52:14,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:14,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:52:14,289 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2022-03-03 19:52:14,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:14,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111025227] [2022-03-03 19:52:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:14,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111025227] [2022-03-03 19:52:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111025227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235818497] [2022-03-03 19:52:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:14,870 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:14,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:52:14,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:52:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:15,145 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:52:15,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:52:15,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-03 19:52:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:15,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:15,552 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:15,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-03-03 19:52:15,819 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:15,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:52:15,845 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:15,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:52:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:16,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235818497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:16,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:16,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:52:16,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466789605] [2022-03-03 19:52:16,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:52:16,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:52:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:52:16,359 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:19,124 INFO L93 Difference]: Finished difference Result 73959 states and 303171 transitions. [2022-03-03 19:52:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:52:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:52:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:19,403 INFO L225 Difference]: With dead ends: 73959 [2022-03-03 19:52:19,404 INFO L226 Difference]: Without dead ends: 73743 [2022-03-03 19:52:19,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=2987, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:52:19,405 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 629 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:19,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 691 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:52:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73743 states. [2022-03-03 19:52:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73743 to 35063. [2022-03-03 19:52:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-03-03 19:52:20,843 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-03-03 19:52:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-03-03 19:52:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-03-03 19:52:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:20,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:20,931 INFO L514 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] [2022-03-03 19:52:20,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:21,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:52:21,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2022-03-03 19:52:21,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:21,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722792366] [2022-03-03 19:52:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:21,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:21,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722792366] [2022-03-03 19:52:21,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722792366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:21,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923241526] [2022-03-03 19:52:21,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:21,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:21,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:21,464 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:21,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:52:21,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:52:21,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:52:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:21,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:21,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-03-03 19:52:21,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:21,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2022-03-03 19:52:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:22,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2022-03-03 19:52:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:22,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:22,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:22,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2022-03-03 19:52:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2022-03-03 19:52:27,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 112 [2022-03-03 19:52:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:28,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923241526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:28,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:28,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-03-03 19:52:28,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344627109] [2022-03-03 19:52:28,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:28,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:52:28,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:52:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:52:28,987 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:04,190 INFO L93 Difference]: Finished difference Result 85082 states and 341640 transitions. [2022-03-03 19:53:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-03 19:53:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:04,541 INFO L225 Difference]: With dead ends: 85082 [2022-03-03 19:53:04,541 INFO L226 Difference]: Without dead ends: 85008 [2022-03-03 19:53:04,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 67 SyntacticMatches, 32 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18775 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=5360, Invalid=36044, Unknown=8, NotChecked=0, Total=41412 [2022-03-03 19:53:04,551 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1446 mSDsluCounter, 4882 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 15424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12402 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:04,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 1281 Invalid, 15424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2765 Invalid, 0 Unknown, 12402 Unchecked, 1.5s Time] [2022-03-03 19:53:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85008 states. [2022-03-03 19:53:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85008 to 36789. [2022-03-03 19:53:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36789 states, 36788 states have (on average 4.1157442644340545) internal successors, (151410), 36788 states have internal predecessors, (151410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36789 states to 36789 states and 151410 transitions. [2022-03-03 19:53:06,025 INFO L78 Accepts]: Start accepts. Automaton has 36789 states and 151410 transitions. Word has length 39 [2022-03-03 19:53:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:06,025 INFO L470 AbstractCegarLoop]: Abstraction has 36789 states and 151410 transitions. [2022-03-03 19:53:06,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 36789 states and 151410 transitions. [2022-03-03 19:53:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:06,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:06,119 INFO L514 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] [2022-03-03 19:53:06,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-03 19:53:06,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:06,320 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2022-03-03 19:53:06,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:06,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020268694] [2022-03-03 19:53:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:06,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:06,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020268694] [2022-03-03 19:53:06,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020268694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:06,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338539001] [2022-03-03 19:53:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:53:06,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:06,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:06,701 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:06,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:53:06,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:53:06,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:53:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:07,006 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:07,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:53:07,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:53:07,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:53:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:07,409 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:07,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 60 [2022-03-03 19:53:07,724 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:07,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:53:07,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:07,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:53:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:08,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338539001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:08,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:08,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:53:08,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967378832] [2022-03-03 19:53:08,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:08,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:53:08,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:53:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:53:08,159 INFO L87 Difference]: Start difference. First operand 36789 states and 151410 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:11,163 INFO L93 Difference]: Finished difference Result 83699 states and 340717 transitions. [2022-03-03 19:53:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:53:11,163 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:11,516 INFO L225 Difference]: With dead ends: 83699 [2022-03-03 19:53:11,516 INFO L226 Difference]: Without dead ends: 83644 [2022-03-03 19:53:11,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:53:11,517 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 537 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:11,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 511 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:53:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2022-03-03 19:53:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 36511. [2022-03-03 19:53:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36511 states, 36510 states have (on average 4.134155026020268) internal successors, (150938), 36510 states have internal predecessors, (150938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36511 states to 36511 states and 150938 transitions. [2022-03-03 19:53:13,157 INFO L78 Accepts]: Start accepts. Automaton has 36511 states and 150938 transitions. Word has length 39 [2022-03-03 19:53:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:13,157 INFO L470 AbstractCegarLoop]: Abstraction has 36511 states and 150938 transitions. [2022-03-03 19:53:13,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 36511 states and 150938 transitions. [2022-03-03 19:53:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:13,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:13,244 INFO L514 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] [2022-03-03 19:53:13,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:53:13,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:13,455 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2022-03-03 19:53:13,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:13,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346500] [2022-03-03 19:53:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:13,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:13,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346500] [2022-03-03 19:53:13,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:13,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495841506] [2022-03-03 19:53:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:53:13,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:13,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:13,837 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:13,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:53:13,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:53:13,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:13,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-03 19:53:13,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:14,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-03 19:53:14,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-03 19:53:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:14,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-03-03 19:53:15,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:15,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-03-03 19:53:15,444 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:15,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:53:15,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:15,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-03-03 19:53:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:15,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495841506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:15,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:15,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-03 19:53:15,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242386124] [2022-03-03 19:53:15,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:53:15,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:53:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:53:15,546 INFO L87 Difference]: Start difference. First operand 36511 states and 150938 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:28,610 INFO L93 Difference]: Finished difference Result 112883 states and 456658 transitions. [2022-03-03 19:53:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-03 19:53:28,611 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:29,280 INFO L225 Difference]: With dead ends: 112883 [2022-03-03 19:53:29,280 INFO L226 Difference]: Without dead ends: 112572 [2022-03-03 19:53:29,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4044, Invalid=31488, Unknown=0, NotChecked=0, Total=35532 [2022-03-03 19:53:29,282 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1807 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2280 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:29,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 1286 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4215 Invalid, 0 Unknown, 2280 Unchecked, 2.3s Time] [2022-03-03 19:53:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112572 states. [2022-03-03 19:53:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112572 to 36899. [2022-03-03 19:53:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36899 states, 36898 states have (on average 4.128326738576616) internal successors, (152327), 36898 states have internal predecessors, (152327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 152327 transitions. [2022-03-03 19:53:31,173 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 152327 transitions. Word has length 39 [2022-03-03 19:53:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 36899 states and 152327 transitions. [2022-03-03 19:53:31,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 152327 transitions. [2022-03-03 19:53:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:31,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:31,258 INFO L514 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] [2022-03-03 19:53:31,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:53:31,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:31,459 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2022-03-03 19:53:31,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:31,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454586905] [2022-03-03 19:53:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:31,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:31,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:31,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454586905] [2022-03-03 19:53:31,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454586905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:31,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599168162] [2022-03-03 19:53:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:31,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:31,856 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:31,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:53:31,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:53:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:53:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:32,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:32,316 INFO L387 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 26 treesize of output 44 [2022-03-03 19:53:32,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:53:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:32,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-03 19:53:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:32,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:32,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:32,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:32,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 73 [2022-03-03 19:53:33,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:33,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:33,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 72 [2022-03-03 19:53:33,692 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:33,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 82 [2022-03-03 19:53:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:34,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599168162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:34,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:34,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-03-03 19:53:34,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832461395] [2022-03-03 19:53:34,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:34,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:53:34,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:53:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:53:34,148 INFO L87 Difference]: Start difference. First operand 36899 states and 152327 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:37,928 INFO L93 Difference]: Finished difference Result 68964 states and 278866 transitions. [2022-03-03 19:53:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:53:37,929 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:38,207 INFO L225 Difference]: With dead ends: 68964 [2022-03-03 19:53:38,207 INFO L226 Difference]: Without dead ends: 68817 [2022-03-03 19:53:38,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1099, Invalid=6557, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:53:38,208 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 647 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:38,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 821 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2165 Invalid, 0 Unknown, 1533 Unchecked, 1.1s Time] [2022-03-03 19:53:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68817 states. [2022-03-03 19:53:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68817 to 37697. [2022-03-03 19:53:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37697 states, 37696 states have (on average 4.120331069609508) internal successors, (155320), 37696 states have internal predecessors, (155320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37697 states to 37697 states and 155320 transitions. [2022-03-03 19:53:39,486 INFO L78 Accepts]: Start accepts. Automaton has 37697 states and 155320 transitions. Word has length 39 [2022-03-03 19:53:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:39,486 INFO L470 AbstractCegarLoop]: Abstraction has 37697 states and 155320 transitions. [2022-03-03 19:53:39,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 37697 states and 155320 transitions. [2022-03-03 19:53:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:39,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:39,763 INFO L514 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] [2022-03-03 19:53:39,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:39,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 19:53:39,975 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -305709141, now seen corresponding path program 25 times [2022-03-03 19:53:39,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:39,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045039933] [2022-03-03 19:53:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:40,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:40,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045039933] [2022-03-03 19:53:40,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045039933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:40,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275663815] [2022-03-03 19:53:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:40,352 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:40,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:53:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:53:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:40,642 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:40,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:53:40,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:53:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-03-03 19:53:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:40,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:41,067 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:41,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-03-03 19:53:41,324 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:41,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:53:41,349 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:41,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:53:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:41,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275663815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:41,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:41,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:53:41,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839912145] [2022-03-03 19:53:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:41,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:53:41,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:53:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:41,672 INFO L87 Difference]: Start difference. First operand 37697 states and 155320 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:44,871 INFO L93 Difference]: Finished difference Result 91699 states and 372721 transitions. [2022-03-03 19:53:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:53:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:45,401 INFO L225 Difference]: With dead ends: 91699 [2022-03-03 19:53:45,401 INFO L226 Difference]: Without dead ends: 91443 [2022-03-03 19:53:45,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=3747, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:53:45,402 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 645 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:45,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 663 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:53:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91443 states. [2022-03-03 19:53:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91443 to 37049. [2022-03-03 19:53:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37049 states, 37048 states have (on average 4.127051392787735) internal successors, (152899), 37048 states have internal predecessors, (152899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37049 states to 37049 states and 152899 transitions. [2022-03-03 19:53:47,115 INFO L78 Accepts]: Start accepts. Automaton has 37049 states and 152899 transitions. Word has length 39 [2022-03-03 19:53:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 37049 states and 152899 transitions. [2022-03-03 19:53:47,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 37049 states and 152899 transitions. [2022-03-03 19:53:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:47,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:47,220 INFO L514 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] [2022-03-03 19:53:47,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 19:53:47,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-03 19:53:47,420 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-03-03 19:53:47,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:47,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400946900] [2022-03-03 19:53:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:47,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:47,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400946900] [2022-03-03 19:53:47,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400946900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:47,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560144097] [2022-03-03 19:53:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:53:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:47,792 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:53:47,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:53:47,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:53:47,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:48,086 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:48,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:53:48,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:53:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:48,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:48,457 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:48,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-03-03 19:53:48,695 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:48,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 70 [2022-03-03 19:53:48,721 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:48,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 86 [2022-03-03 19:53:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:49,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560144097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:49,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:49,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:53:49,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638404905] [2022-03-03 19:53:49,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:53:49,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:53:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:53:49,302 INFO L87 Difference]: Start difference. First operand 37049 states and 152899 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:51,371 INFO L93 Difference]: Finished difference Result 69511 states and 285616 transitions. [2022-03-03 19:53:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:53:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:51,654 INFO L225 Difference]: With dead ends: 69511 [2022-03-03 19:53:51,654 INFO L226 Difference]: Without dead ends: 69456 [2022-03-03 19:53:51,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:53:51,655 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 383 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:51,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 534 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:53:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69456 states. [2022-03-03 19:53:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69456 to 36877. [2022-03-03 19:53:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 4.128864301985031) internal successors, (152256), 36876 states have internal predecessors, (152256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 152256 transitions. [2022-03-03 19:53:52,868 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 152256 transitions. Word has length 39 [2022-03-03 19:53:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 36877 states and 152256 transitions. [2022-03-03 19:53:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 152256 transitions. [2022-03-03 19:53:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:53,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:53,146 INFO L514 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] [2022-03-03 19:53:53,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-03 19:53:53,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-03 19:53:53,355 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 847258595, now seen corresponding path program 27 times [2022-03-03 19:53:53,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:53,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864243049] [2022-03-03 19:53:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:53,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:53,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:53,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864243049] [2022-03-03 19:53:53,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864243049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:53,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360226865] [2022-03-03 19:53:53,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:53,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:53,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:53,721 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:53,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:53:53,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:53:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-03 19:53:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:54,127 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:53:54,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-03-03 19:53:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:54,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:54,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2022-03-03 19:53:54,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:54,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2022-03-03 19:53:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:54,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:55,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:55,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 70 [2022-03-03 19:53:56,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:56,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 84 [2022-03-03 19:53:56,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:56,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 96 [2022-03-03 19:53:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:57,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360226865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:57,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:57,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-03-03 19:53:57,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083158695] [2022-03-03 19:53:57,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:57,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:53:57,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:53:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:53:57,161 INFO L87 Difference]: Start difference. First operand 36877 states and 152256 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:59,917 INFO L93 Difference]: Finished difference Result 58469 states and 237492 transitions. [2022-03-03 19:53:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:53:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:53:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:00,151 INFO L225 Difference]: With dead ends: 58469 [2022-03-03 19:54:00,152 INFO L226 Difference]: Without dead ends: 58410 [2022-03-03 19:54:00,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1104, Invalid=5376, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:54:00,153 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 486 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2688 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:00,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 545 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 788 Invalid, 0 Unknown, 2688 Unchecked, 0.4s Time] [2022-03-03 19:54:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58410 states. [2022-03-03 19:54:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58410 to 37371. [2022-03-03 19:54:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37371 states, 37370 states have (on average 4.122076531977522) internal successors, (154042), 37370 states have internal predecessors, (154042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37371 states to 37371 states and 154042 transitions. [2022-03-03 19:54:01,324 INFO L78 Accepts]: Start accepts. Automaton has 37371 states and 154042 transitions. Word has length 39 [2022-03-03 19:54:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:01,324 INFO L470 AbstractCegarLoop]: Abstraction has 37371 states and 154042 transitions. [2022-03-03 19:54:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37371 states and 154042 transitions. [2022-03-03 19:54:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:01,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:01,406 INFO L514 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] [2022-03-03 19:54:01,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 19:54:01,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:01,606 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:01,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1095774921, now seen corresponding path program 28 times [2022-03-03 19:54:01,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:01,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459322504] [2022-03-03 19:54:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:02,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:02,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459322504] [2022-03-03 19:54:02,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459322504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:02,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874356258] [2022-03-03 19:54:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:02,216 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:02,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:54:02,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:02,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:02,525 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:02,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-03-03 19:54:02,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:54:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:02,956 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:02,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-03-03 19:54:03,237 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:03,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 83 [2022-03-03 19:54:03,265 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:03,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 93 [2022-03-03 19:54:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:03,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874356258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:03,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:03,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:54:03,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355406661] [2022-03-03 19:54:03,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:03,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:54:03,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:54:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:54:03,620 INFO L87 Difference]: Start difference. First operand 37371 states and 154042 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:05,963 INFO L93 Difference]: Finished difference Result 72319 states and 295080 transitions. [2022-03-03 19:54:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:54:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:06,258 INFO L225 Difference]: With dead ends: 72319 [2022-03-03 19:54:06,258 INFO L226 Difference]: Without dead ends: 72123 [2022-03-03 19:54:06,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:54:06,259 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 444 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:06,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 462 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:54:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72123 states. [2022-03-03 19:54:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72123 to 36801. [2022-03-03 19:54:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36801 states, 36800 states have (on average 4.13133152173913) internal successors, (152033), 36800 states have internal predecessors, (152033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36801 states to 36801 states and 152033 transitions. [2022-03-03 19:54:07,514 INFO L78 Accepts]: Start accepts. Automaton has 36801 states and 152033 transitions. Word has length 39 [2022-03-03 19:54:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:07,514 INFO L470 AbstractCegarLoop]: Abstraction has 36801 states and 152033 transitions. [2022-03-03 19:54:07,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36801 states and 152033 transitions. [2022-03-03 19:54:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:07,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:07,592 INFO L514 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] [2022-03-03 19:54:07,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 19:54:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:54:07,799 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-03-03 19:54:07,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:07,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881676272] [2022-03-03 19:54:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:08,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:08,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881676272] [2022-03-03 19:54:08,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881676272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:08,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037163422] [2022-03-03 19:54:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:08,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:08,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:08,352 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:54:08,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:54:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:54:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:08,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:08,695 INFO L387 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 38 treesize of output 56 [2022-03-03 19:54:08,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-03 19:54:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:08,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:08,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 19:54:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:09,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:09,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:09,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-03-03 19:54:10,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:10,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 69 [2022-03-03 19:54:10,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:10,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 79 [2022-03-03 19:54:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:10,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037163422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:10,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:10,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-03 19:54:10,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596062283] [2022-03-03 19:54:10,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:10,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:54:10,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:54:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:54:10,714 INFO L87 Difference]: Start difference. First operand 36801 states and 152033 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:17,731 INFO L93 Difference]: Finished difference Result 80252 states and 327195 transitions. [2022-03-03 19:54:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-03 19:54:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:18,066 INFO L225 Difference]: With dead ends: 80252 [2022-03-03 19:54:18,066 INFO L226 Difference]: Without dead ends: 80059 [2022-03-03 19:54:18,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1816, Invalid=11990, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:54:18,067 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1351 mSDsluCounter, 2580 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 7195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3375 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:18,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1005 Invalid, 7195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 3555 Invalid, 0 Unknown, 3375 Unchecked, 1.7s Time] [2022-03-03 19:54:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80059 states. [2022-03-03 19:54:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80059 to 37259. [2022-03-03 19:54:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 4.12480541091846) internal successors, (153682), 37258 states have internal predecessors, (153682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 153682 transitions. [2022-03-03 19:54:19,629 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 153682 transitions. Word has length 39 [2022-03-03 19:54:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:19,629 INFO L470 AbstractCegarLoop]: Abstraction has 37259 states and 153682 transitions. [2022-03-03 19:54:19,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 153682 transitions. [2022-03-03 19:54:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:19,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:19,730 INFO L514 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] [2022-03-03 19:54:19,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:54:19,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:54:19,931 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1493840823, now seen corresponding path program 30 times [2022-03-03 19:54:19,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:19,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024385202] [2022-03-03 19:54:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:20,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:20,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024385202] [2022-03-03 19:54:20,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024385202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:20,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988864626] [2022-03-03 19:54:20,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:20,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:20,299 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:54:20,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:54:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:20,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:54:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:20,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-03 19:54:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:21,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-03 19:54:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:21,713 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:21,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 65 [2022-03-03 19:54:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:22,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:22,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:54:22,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:22,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:22,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:22,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:22,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2022-03-03 19:54:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:23,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988864626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:23,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:23,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-03-03 19:54:23,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415189000] [2022-03-03 19:54:23,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:23,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:54:23,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:54:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:54:23,313 INFO L87 Difference]: Start difference. First operand 37259 states and 153682 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:27,310 INFO L93 Difference]: Finished difference Result 80782 states and 325196 transitions. [2022-03-03 19:54:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:54:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:27,800 INFO L225 Difference]: With dead ends: 80782 [2022-03-03 19:54:27,800 INFO L226 Difference]: Without dead ends: 80728 [2022-03-03 19:54:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1182, Invalid=8324, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:54:27,801 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 527 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 4392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2594 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:27,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 842 Invalid, 4392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1721 Invalid, 0 Unknown, 2594 Unchecked, 0.7s Time] [2022-03-03 19:54:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80728 states. [2022-03-03 19:54:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80728 to 37763. [2022-03-03 19:54:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37763 states, 37762 states have (on average 4.117737407976272) internal successors, (155494), 37762 states have internal predecessors, (155494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37763 states to 37763 states and 155494 transitions. [2022-03-03 19:54:29,169 INFO L78 Accepts]: Start accepts. Automaton has 37763 states and 155494 transitions. Word has length 39 [2022-03-03 19:54:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 37763 states and 155494 transitions. [2022-03-03 19:54:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37763 states and 155494 transitions. [2022-03-03 19:54:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:29,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:29,256 INFO L514 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] [2022-03-03 19:54:29,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 19:54:29,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:54:29,459 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1514365043, now seen corresponding path program 31 times [2022-03-03 19:54:29,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:29,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625725391] [2022-03-03 19:54:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:29,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:29,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:29,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625725391] [2022-03-03 19:54:29,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625725391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:29,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175727491] [2022-03-03 19:54:29,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:29,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:29,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:29,851 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:29,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:54:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:29,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:30,267 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:30,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-03-03 19:54:30,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:54:30,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-03-03 19:54:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:30,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:30,579 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:30,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-03-03 19:54:30,964 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:30,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:54:30,990 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:30,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:54:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:31,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175727491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:31,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:31,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:54:31,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967330290] [2022-03-03 19:54:31,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:31,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:54:31,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:54:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:54:31,223 INFO L87 Difference]: Start difference. First operand 37763 states and 155494 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:33,615 INFO L93 Difference]: Finished difference Result 85303 states and 348821 transitions. [2022-03-03 19:54:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:54:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:34,147 INFO L225 Difference]: With dead ends: 85303 [2022-03-03 19:54:34,147 INFO L226 Difference]: Without dead ends: 85055 [2022-03-03 19:54:34,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:54:34,148 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 669 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:34,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 502 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:54:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85055 states. [2022-03-03 19:54:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85055 to 37951. [2022-03-03 19:54:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37951 states, 37950 states have (on average 4.115889328063241) internal successors, (156198), 37950 states have internal predecessors, (156198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37951 states to 37951 states and 156198 transitions. [2022-03-03 19:54:35,551 INFO L78 Accepts]: Start accepts. Automaton has 37951 states and 156198 transitions. Word has length 39 [2022-03-03 19:54:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 37951 states and 156198 transitions. [2022-03-03 19:54:35,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 37951 states and 156198 transitions. [2022-03-03 19:54:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:35,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:35,637 INFO L514 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] [2022-03-03 19:54:35,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:35,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:54:35,837 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1838065757, now seen corresponding path program 32 times [2022-03-03 19:54:35,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:35,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698523718] [2022-03-03 19:54:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:35,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:36,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:36,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698523718] [2022-03-03 19:54:36,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698523718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:36,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031621952] [2022-03-03 19:54:36,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:36,207 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:36,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:54:36,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:36,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:36,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:54:36,669 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:36,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2022-03-03 19:54:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:36,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:37,091 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:37,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-03-03 19:54:37,318 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:37,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:54:37,343 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:37,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 85 [2022-03-03 19:54:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:37,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031621952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:37,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:37,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:54:37,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887897393] [2022-03-03 19:54:37,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:37,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:54:37,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:54:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:54:37,659 INFO L87 Difference]: Start difference. First operand 37951 states and 156198 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:39,747 INFO L93 Difference]: Finished difference Result 93729 states and 380985 transitions. [2022-03-03 19:54:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:54:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:40,338 INFO L225 Difference]: With dead ends: 93729 [2022-03-03 19:54:40,339 INFO L226 Difference]: Without dead ends: 93577 [2022-03-03 19:54:40,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:54:40,339 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 665 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:40,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 339 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:54:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93577 states. [2022-03-03 19:54:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93577 to 38039. [2022-03-03 19:54:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38039 states, 38038 states have (on average 4.116515063883485) internal successors, (156584), 38038 states have internal predecessors, (156584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38039 states to 38039 states and 156584 transitions. [2022-03-03 19:54:41,963 INFO L78 Accepts]: Start accepts. Automaton has 38039 states and 156584 transitions. Word has length 39 [2022-03-03 19:54:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:41,964 INFO L470 AbstractCegarLoop]: Abstraction has 38039 states and 156584 transitions. [2022-03-03 19:54:41,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 38039 states and 156584 transitions. [2022-03-03 19:54:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:42,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:42,052 INFO L514 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] [2022-03-03 19:54:42,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:54:42,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 19:54:42,253 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 33 times [2022-03-03 19:54:42,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:42,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853425122] [2022-03-03 19:54:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:42,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:42,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853425122] [2022-03-03 19:54:42,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853425122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:42,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334425530] [2022-03-03 19:54:42,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:42,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:42,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:42,813 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:42,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:54:42,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:54:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-03 19:54:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:43,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:54:43,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:43,270 INFO L387 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 42 treesize of output 60 [2022-03-03 19:54:43,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-03 19:54:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:43,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:44,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:44,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 61 [2022-03-03 19:54:44,474 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:44,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 84 [2022-03-03 19:54:44,501 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:44,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 94 [2022-03-03 19:54:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:45,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334425530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:45,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:45,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 37 [2022-03-03 19:54:45,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412734881] [2022-03-03 19:54:45,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:45,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:54:45,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:54:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:54:45,046 INFO L87 Difference]: Start difference. First operand 38039 states and 156584 transitions. Second operand has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:47,754 INFO L93 Difference]: Finished difference Result 66286 states and 267095 transitions. [2022-03-03 19:54:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:54:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:54:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:47,990 INFO L225 Difference]: With dead ends: 66286 [2022-03-03 19:54:47,990 INFO L226 Difference]: Without dead ends: 66109 [2022-03-03 19:54:47,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=826, Invalid=4286, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:54:47,991 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 875 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 3507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1997 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:47,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 741 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1409 Invalid, 0 Unknown, 1997 Unchecked, 0.7s Time] [2022-03-03 19:54:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66109 states. [2022-03-03 19:54:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66109 to 39831. [2022-03-03 19:54:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 4.098217424052222) internal successors, (163232), 39830 states have internal predecessors, (163232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 163232 transitions. [2022-03-03 19:54:49,295 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 163232 transitions. Word has length 39 [2022-03-03 19:54:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:49,295 INFO L470 AbstractCegarLoop]: Abstraction has 39831 states and 163232 transitions. [2022-03-03 19:54:49,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 163232 transitions. [2022-03-03 19:54:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:49,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:49,594 INFO L514 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] [2022-03-03 19:54:49,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:49,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:49,807 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1362875593, now seen corresponding path program 34 times [2022-03-03 19:54:49,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:49,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503271929] [2022-03-03 19:54:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:50,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:50,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503271929] [2022-03-03 19:54:50,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503271929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:50,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666079271] [2022-03-03 19:54:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:50,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:50,214 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:50,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:54:50,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:50,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:50,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:54:50,701 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:50,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2022-03-03 19:54:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:50,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:50,998 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:50,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 73 [2022-03-03 19:54:51,308 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:51,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 83 [2022-03-03 19:54:51,337 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:51,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 93 [2022-03-03 19:54:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:51,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666079271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:51,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:51,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:54:51,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5402346] [2022-03-03 19:54:51,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:51,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:54:51,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:54:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:54:51,780 INFO L87 Difference]: Start difference. First operand 39831 states and 163232 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)