/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:13:46,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:13:46,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:13:46,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:13:46,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:13:46,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:13:46,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:13:46,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:13:46,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:13:46,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:13:46,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:13:46,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:13:46,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:13:46,389 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:13:46,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:13:46,390 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:13:46,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:13:46,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:13:46,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:13:46,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:13:46,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:13:46,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:13:46,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:13:46,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:13:46,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:13:46,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:13:46,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:13:46,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:13:46,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:13:46,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:13:46,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:13:46,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:13:46,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:13:46,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:13:46,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:13:46,659 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:13:46,660 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:13:46,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2022-03-01 18:13:46,661 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2022-03-01 18:13:46,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:13:46,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:13:46,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:13:46,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:13:46,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:13:46,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,708 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:13:46,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:13:46,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:13:46,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:13:46,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:13:46,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:13:46,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:13:46,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:13:46,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:13:46,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/1) ... [2022-03-01 18:13:46,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:13:46,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:46,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:13:46,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:13:46,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:13:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:13:46,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:13:46,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:13:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:13:46,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:13:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:13:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:13:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:13:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:13:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:13:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:13:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 18:13:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 18:13:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 18:13:46,795 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:13:46,843 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:13:46,845 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:13:46,995 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:13:47,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:13:47,018 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:13:47,024 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:13:47 BoogieIcfgContainer [2022-03-01 18:13:47,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:13:47,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:13:47,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:13:47,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:13:47,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:13:46" (1/2) ... [2022-03-01 18:13:47,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff0e2df and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:13:47, skipping insertion in model container [2022-03-01 18:13:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:13:47" (2/2) ... [2022-03-01 18:13:47,038 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2022-03-01 18:13:47,044 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:13:47,044 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:13:47,044 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:13:47,044 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:13:47,104 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-01 18:13:47,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:13:47,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:13:47,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-01 18:13:47,200 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-01 18:13:47,334 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) [2022-03-01 18:13:47,338 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) [2022-03-01 18:13:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:13:47,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:47,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:47,364 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -315677691, now seen corresponding path program 1 times [2022-03-01 18:13:47,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:47,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853703056] [2022-03-01 18:13:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:47,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:47,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853703056] [2022-03-01 18:13:47,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853703056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:13:47,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:13:47,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:13:47,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225082673] [2022-03-01 18:13:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:13:47,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:13:47,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:13:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:13:47,581 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) [2022-03-01 18:13:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:47,662 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2022-03-01 18:13:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:13:47,665 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 [2022-03-01 18:13:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:47,690 INFO L225 Difference]: With dead ends: 691 [2022-03-01 18:13:47,691 INFO L226 Difference]: Without dead ends: 691 [2022-03-01 18:13:47,692 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 [2022-03-01 18:13:47,698 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:47,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:13:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-01 18:13:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2022-03-01 18:13:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2022-03-01 18:13:47,851 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2022-03-01 18:13:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2022-03-01 18:13:47,851 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) [2022-03-01 18:13:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2022-03-01 18:13:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:13:47,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:47,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:47,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:13:47,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1754302367, now seen corresponding path program 1 times [2022-03-01 18:13:47,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:47,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889330336] [2022-03-01 18:13:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:47,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:47,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889330336] [2022-03-01 18:13:47,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889330336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:47,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075652110] [2022-03-01 18:13:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:47,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:47,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:13:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:13:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:48,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:13:48,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075652110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:13:48,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:13:48,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-01 18:13:48,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221113228] [2022-03-01 18:13:48,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:13:48,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:13:48,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:13:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:13:48,059 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:48,136 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2022-03-01 18:13:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:13:48,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:13:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:48,149 INFO L225 Difference]: With dead ends: 1250 [2022-03-01 18:13:48,150 INFO L226 Difference]: Without dead ends: 1250 [2022-03-01 18:13:48,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:13:48,152 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:48,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:13:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-03-01 18:13:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2022-03-01 18:13:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2022-03-01 18:13:48,208 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2022-03-01 18:13:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:48,209 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2022-03-01 18:13:48,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2022-03-01 18:13:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:13:48,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:48,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:48,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:48,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:48,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash 971971041, now seen corresponding path program 1 times [2022-03-01 18:13:48,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:48,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171350822] [2022-03-01 18:13:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:48,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:48,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:48,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171350822] [2022-03-01 18:13:48,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171350822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:48,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778304951] [2022-03-01 18:13:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:48,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:48,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:48,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:48,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:13:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:13:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:48,812 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 [2022-03-01 18:13:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:48,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:48,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:13:48,981 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 13 treesize of output 17 [2022-03-01 18:13:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:49,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778304951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:49,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:49,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-03-01 18:13:49,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810506345] [2022-03-01 18:13:49,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:13:49,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:13:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:13:49,052 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:49,164 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2022-03-01 18:13:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:13:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:13:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:49,181 INFO L225 Difference]: With dead ends: 1934 [2022-03-01 18:13:49,181 INFO L226 Difference]: Without dead ends: 1807 [2022-03-01 18:13:49,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:13:49,183 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:49,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:13:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-03-01 18:13:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2022-03-01 18:13:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2022-03-01 18:13:49,251 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2022-03-01 18:13:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:49,252 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2022-03-01 18:13:49,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2022-03-01 18:13:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:13:49,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:49,258 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] [2022-03-01 18:13:49,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-01 18:13:49,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash 770843555, now seen corresponding path program 2 times [2022-03-01 18:13:49,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:49,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812648310] [2022-03-01 18:13:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:49,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:49,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812648310] [2022-03-01 18:13:49,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812648310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:49,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515848371] [2022-03-01 18:13:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:13:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:49,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:49,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:13:49,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:13:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:13:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:49,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:49,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515848371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:49,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:49,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-01 18:13:49,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172509103] [2022-03-01 18:13:49,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:49,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:13:49,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:13:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:13:49,737 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:49,904 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2022-03-01 18:13:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:13:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:13:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:49,923 INFO L225 Difference]: With dead ends: 2404 [2022-03-01 18:13:49,923 INFO L226 Difference]: Without dead ends: 2234 [2022-03-01 18:13:49,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:13:49,926 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:49,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:13:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-03-01 18:13:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2022-03-01 18:13:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2022-03-01 18:13:50,018 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2022-03-01 18:13:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2022-03-01 18:13:50,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2022-03-01 18:13:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:13:50,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:50,032 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] [2022-03-01 18:13:50,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:50,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:50,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1128294111, now seen corresponding path program 1 times [2022-03-01 18:13:50,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:50,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198171416] [2022-03-01 18:13:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:50,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:50,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198171416] [2022-03-01 18:13:50,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198171416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:13:50,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:13:50,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:13:50,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297507771] [2022-03-01 18:13:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:13:50,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:13:50,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:13:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:13:50,332 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:50,402 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2022-03-01 18:13:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:13:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:13:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:50,432 INFO L225 Difference]: With dead ends: 3426 [2022-03-01 18:13:50,432 INFO L226 Difference]: Without dead ends: 3255 [2022-03-01 18:13:50,433 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 [2022-03-01 18:13:50,434 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:50,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:13:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-03-01 18:13:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2022-03-01 18:13:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2022-03-01 18:13:50,547 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2022-03-01 18:13:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2022-03-01 18:13:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2022-03-01 18:13:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:13:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:50,558 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] [2022-03-01 18:13:50,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:13:50,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -448766263, now seen corresponding path program 3 times [2022-03-01 18:13:50,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:50,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398444828] [2022-03-01 18:13:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:50,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:50,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398444828] [2022-03-01 18:13:50,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398444828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:50,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75800644] [2022-03-01 18:13:50,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:13:50,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:50,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:50,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:13:50,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:13:50,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:13:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:13:50,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:13:50,976 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 26 treesize of output 32 [2022-03-01 18:13:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:51,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:13:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:13:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:13:51,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:13:51,490 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 25 treesize of output 31 [2022-03-01 18:13:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:51,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75800644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:51,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:51,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-03-01 18:13:51,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550901673] [2022-03-01 18:13:51,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:13:51,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:13:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:13:51,663 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:52,156 INFO L93 Difference]: Finished difference Result 7428 states and 28812 transitions. [2022-03-01 18:13:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:13:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:13:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:52,221 INFO L225 Difference]: With dead ends: 7428 [2022-03-01 18:13:52,222 INFO L226 Difference]: Without dead ends: 7208 [2022-03-01 18:13:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:13:52,224 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 410 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:52,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 711 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 199 Unchecked, 0.2s Time] [2022-03-01 18:13:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2022-03-01 18:13:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 4181. [2022-03-01 18:13:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 4180 states have (on average 3.95933014354067) internal successors, (16550), 4180 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 16550 transitions. [2022-03-01 18:13:52,484 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 16550 transitions. Word has length 29 [2022-03-01 18:13:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:52,485 INFO L470 AbstractCegarLoop]: Abstraction has 4181 states and 16550 transitions. [2022-03-01 18:13:52,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 16550 transitions. [2022-03-01 18:13:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:13:52,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:52,502 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] [2022-03-01 18:13:52,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:52,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:52,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1095707459, now seen corresponding path program 4 times [2022-03-01 18:13:52,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:52,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972136617] [2022-03-01 18:13:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:52,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:52,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972136617] [2022-03-01 18:13:52,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972136617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:52,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112750227] [2022-03-01 18:13:52,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:13:52,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:52,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:52,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:52,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:13:52,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:13:52,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:52,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:13:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:53,083 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:13:53,083 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 12 [2022-03-01 18:13:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:53,288 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:13:53,289 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 26 treesize of output 50 [2022-03-01 18:13:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:53,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112750227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:53,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:53,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 18:13:53,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239915461] [2022-03-01 18:13:53,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:53,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:13:53,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:13:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:13:53,430 INFO L87 Difference]: Start difference. First operand 4181 states and 16550 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:54,091 INFO L93 Difference]: Finished difference Result 10023 states and 38688 transitions. [2022-03-01 18:13:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:13:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:13:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:54,153 INFO L225 Difference]: With dead ends: 10023 [2022-03-01 18:13:54,153 INFO L226 Difference]: Without dead ends: 9344 [2022-03-01 18:13:54,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:13:54,154 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 309 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:54,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 490 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:13:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-03-01 18:13:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 4644. [2022-03-01 18:13:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.0200301529183715) internal successors, (18665), 4643 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 18665 transitions. [2022-03-01 18:13:54,427 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 18665 transitions. Word has length 29 [2022-03-01 18:13:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:54,427 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 18665 transitions. [2022-03-01 18:13:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 18665 transitions. [2022-03-01 18:13:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:13:54,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:54,446 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] [2022-03-01 18:13:54,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:54,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:54,660 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 662589228, now seen corresponding path program 1 times [2022-03-01 18:13:54,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:54,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62545706] [2022-03-01 18:13:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:13:54,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:54,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62545706] [2022-03-01 18:13:54,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62545706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:13:54,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:13:54,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:13:54,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929163899] [2022-03-01 18:13:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:13:54,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:13:54,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:13:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:13:54,687 INFO L87 Difference]: Start difference. First operand 4644 states and 18665 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:54,758 INFO L93 Difference]: Finished difference Result 4644 states and 18215 transitions. [2022-03-01 18:13:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:13:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:13:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:54,782 INFO L225 Difference]: With dead ends: 4644 [2022-03-01 18:13:54,782 INFO L226 Difference]: Without dead ends: 4644 [2022-03-01 18:13:54,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:13:54,783 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:54,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:13:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2022-03-01 18:13:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 4644. [2022-03-01 18:13:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 3.923110058152057) internal successors, (18215), 4643 states have internal predecessors, (18215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 18215 transitions. [2022-03-01 18:13:54,975 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 18215 transitions. Word has length 29 [2022-03-01 18:13:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:54,975 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 18215 transitions. [2022-03-01 18:13:54,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 18215 transitions. [2022-03-01 18:13:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:13:54,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:54,998 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] [2022-03-01 18:13:54,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 18:13:54,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2075774616, now seen corresponding path program 2 times [2022-03-01 18:13:54,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:54,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142722748] [2022-03-01 18:13:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:55,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:55,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142722748] [2022-03-01 18:13:55,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142722748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:55,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461406595] [2022-03-01 18:13:55,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:13:55,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:55,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:55,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:55,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:13:55,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:13:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:13:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:55,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461406595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:55,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:55,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-01 18:13:55,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342554996] [2022-03-01 18:13:55,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:13:55,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:13:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:13:55,272 INFO L87 Difference]: Start difference. First operand 4644 states and 18215 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:55,705 INFO L93 Difference]: Finished difference Result 11633 states and 43852 transitions. [2022-03-01 18:13:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:13:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-03-01 18:13:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:55,765 INFO L225 Difference]: With dead ends: 11633 [2022-03-01 18:13:55,765 INFO L226 Difference]: Without dead ends: 11535 [2022-03-01 18:13:55,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:13:55,768 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 298 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:55,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 67 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:13:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11535 states. [2022-03-01 18:13:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11535 to 5310. [2022-03-01 18:13:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 4.09154266340177) internal successors, (21722), 5309 states have internal predecessors, (21722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 21722 transitions. [2022-03-01 18:13:56,067 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 21722 transitions. Word has length 29 [2022-03-01 18:13:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 5310 states and 21722 transitions. [2022-03-01 18:13:56,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 21722 transitions. [2022-03-01 18:13:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:13:56,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:56,085 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] [2022-03-01 18:13:56,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 18:13:56,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:56,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash 757337576, now seen corresponding path program 3 times [2022-03-01 18:13:56,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:56,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375982775] [2022-03-01 18:13:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:56,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:56,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375982775] [2022-03-01 18:13:56,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375982775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:56,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128396488] [2022-03-01 18:13:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:13:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:56,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:56,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:13:56,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:13:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:13:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:56,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:13:56,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128396488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:56,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:56,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-01 18:13:56,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014657199] [2022-03-01 18:13:56,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:56,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:13:56,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:13:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:13:56,639 INFO L87 Difference]: Start difference. First operand 5310 states and 21722 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:57,182 INFO L93 Difference]: Finished difference Result 13188 states and 49597 transitions. [2022-03-01 18:13:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:13:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-03-01 18:13:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:57,243 INFO L225 Difference]: With dead ends: 13188 [2022-03-01 18:13:57,243 INFO L226 Difference]: Without dead ends: 13188 [2022-03-01 18:13:57,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:13:57,244 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:57,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 131 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:13:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2022-03-01 18:13:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 5511. [2022-03-01 18:13:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 4.044101633393829) internal successors, (22283), 5510 states have internal predecessors, (22283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 22283 transitions. [2022-03-01 18:13:57,597 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 22283 transitions. Word has length 29 [2022-03-01 18:13:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:57,597 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 22283 transitions. [2022-03-01 18:13:57,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 22283 transitions. [2022-03-01 18:13:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:13:57,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:57,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:57,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-01 18:13:57,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:57,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1984386215, now seen corresponding path program 5 times [2022-03-01 18:13:57,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:57,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224279889] [2022-03-01 18:13:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:57,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:57,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224279889] [2022-03-01 18:13:57,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224279889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:57,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431616398] [2022-03-01 18:13:57,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:13:57,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:57,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:57,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:13:57,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:13:57,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:13:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:58,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:58,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431616398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:58,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:58,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-03-01 18:13:58,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003491005] [2022-03-01 18:13:58,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:58,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:13:58,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:13:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:13:58,100 INFO L87 Difference]: Start difference. First operand 5511 states and 22283 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:58,297 INFO L93 Difference]: Finished difference Result 9064 states and 35970 transitions. [2022-03-01 18:13:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:13:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 18:13:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:58,335 INFO L225 Difference]: With dead ends: 9064 [2022-03-01 18:13:58,336 INFO L226 Difference]: Without dead ends: 8701 [2022-03-01 18:13:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:13:58,337 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:58,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 149 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:13:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8701 states. [2022-03-01 18:13:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8701 to 7382. [2022-03-01 18:13:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 4.085083322043084) internal successors, (30152), 7381 states have internal predecessors, (30152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 30152 transitions. [2022-03-01 18:13:58,651 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 30152 transitions. Word has length 31 [2022-03-01 18:13:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:58,652 INFO L470 AbstractCegarLoop]: Abstraction has 7382 states and 30152 transitions. [2022-03-01 18:13:58,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 30152 transitions. [2022-03-01 18:13:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:13:58,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:58,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:58,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:58,907 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,SelfDestructingSolverStorable10 [2022-03-01 18:13:58,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash -48538494, now seen corresponding path program 4 times [2022-03-01 18:13:58,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:58,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168340850] [2022-03-01 18:13:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:58,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:58,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168340850] [2022-03-01 18:13:58,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168340850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:58,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791850916] [2022-03-01 18:13:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:13:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:59,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:59,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:13:59,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:13:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:13:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:13:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:59,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:13:59,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791850916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:59,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:59,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-01 18:13:59,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446200715] [2022-03-01 18:13:59,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:59,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:13:59,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:13:59,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:13:59,183 INFO L87 Difference]: Start difference. First operand 7382 states and 30152 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:59,310 INFO L93 Difference]: Finished difference Result 8841 states and 35463 transitions. [2022-03-01 18:13:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:13:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 18:13:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:59,340 INFO L225 Difference]: With dead ends: 8841 [2022-03-01 18:13:59,340 INFO L226 Difference]: Without dead ends: 8841 [2022-03-01 18:13:59,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:13:59,341 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:59,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 94 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:13:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8841 states. [2022-03-01 18:13:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8841 to 6146. [2022-03-01 18:13:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 3.9656631407648493) internal successors, (24369), 6145 states have internal predecessors, (24369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 24369 transitions. [2022-03-01 18:13:59,644 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 24369 transitions. Word has length 32 [2022-03-01 18:13:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:59,645 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 24369 transitions. [2022-03-01 18:13:59,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:13:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 24369 transitions. [2022-03-01 18:13:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:13:59,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:59,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:13:59,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:59,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:59,889 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash -499344603, now seen corresponding path program 6 times [2022-03-01 18:13:59,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:59,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043072577] [2022-03-01 18:13:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:59,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:00,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:00,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043072577] [2022-03-01 18:14:00,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043072577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:00,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560246993] [2022-03-01 18:14:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:00,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:00,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:00,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:14:00,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:14:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:00,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:14:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:00,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:00,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 86 [2022-03-01 18:14:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:00,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:01,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:01,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:01,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:01,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 64 [2022-03-01 18:14:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:01,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560246993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:01,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:01,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-03-01 18:14:01,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250738726] [2022-03-01 18:14:01,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:01,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:14:01,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:14:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:14:01,600 INFO L87 Difference]: Start difference. First operand 6146 states and 24369 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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) [2022-03-01 18:14:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:03,032 INFO L93 Difference]: Finished difference Result 25936 states and 104806 transitions. [2022-03-01 18:14:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:14:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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) Word has length 34 [2022-03-01 18:14:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:03,143 INFO L225 Difference]: With dead ends: 25936 [2022-03-01 18:14:03,144 INFO L226 Difference]: Without dead ends: 25312 [2022-03-01 18:14:03,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:14:03,145 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 786 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1865 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 585 Invalid, 0 Unknown, 707 Unchecked, 0.3s Time] [2022-03-01 18:14:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-03-01 18:14:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 9990. [2022-03-01 18:14:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 4.0841926118730605) internal successors, (40797), 9989 states have internal predecessors, (40797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 40797 transitions. [2022-03-01 18:14:03,775 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 40797 transitions. Word has length 34 [2022-03-01 18:14:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:03,775 INFO L470 AbstractCegarLoop]: Abstraction has 9990 states and 40797 transitions. [2022-03-01 18:14:03,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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) [2022-03-01 18:14:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 40797 transitions. [2022-03-01 18:14:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:03,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:03,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:03,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-01 18:14:04,001 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,SelfDestructingSolverStorable12 [2022-03-01 18:14:04,001 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 243147073, now seen corresponding path program 7 times [2022-03-01 18:14:04,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:04,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510588886] [2022-03-01 18:14:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:04,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510588886] [2022-03-01 18:14:04,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510588886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575873882] [2022-03-01 18:14:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:14:04,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:04,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:04,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:04,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:14:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:04,501 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-01 18:14:04,501 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 36 treesize of output 16 [2022-03-01 18:14:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:04,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:04,765 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:14:04,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-01 18:14:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:05,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575873882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:05,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:05,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-01 18:14:05,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811235883] [2022-03-01 18:14:05,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:05,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:14:05,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:14:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:14:05,442 INFO L87 Difference]: Start difference. First operand 9990 states and 40797 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:06,458 INFO L93 Difference]: Finished difference Result 16771 states and 67781 transitions. [2022-03-01 18:14:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:14:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:06,519 INFO L225 Difference]: With dead ends: 16771 [2022-03-01 18:14:06,519 INFO L226 Difference]: Without dead ends: 16611 [2022-03-01 18:14:06,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:14:06,520 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 272 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:06,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1667 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:14:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16611 states. [2022-03-01 18:14:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16611 to 9615. [2022-03-01 18:14:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9615 states, 9614 states have (on average 4.095277719991679) internal successors, (39372), 9614 states have internal predecessors, (39372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 39372 transitions. [2022-03-01 18:14:07,018 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 39372 transitions. Word has length 34 [2022-03-01 18:14:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:07,018 INFO L470 AbstractCegarLoop]: Abstraction has 9615 states and 39372 transitions. [2022-03-01 18:14:07,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 39372 transitions. [2022-03-01 18:14:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:07,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:07,043 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] [2022-03-01 18:14:07,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 18:14:07,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:14:07,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1420071612, now seen corresponding path program 5 times [2022-03-01 18:14:07,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:07,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510736652] [2022-03-01 18:14:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:07,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:07,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510736652] [2022-03-01 18:14:07,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510736652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:07,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248486440] [2022-03-01 18:14:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:14:07,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:07,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:07,372 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:07,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:14:07,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:14:07,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:14:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:07,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:07,794 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 54 [2022-03-01 18:14:07,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:14:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:08,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:08,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:08,184 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 22 treesize of output 26 [2022-03-01 18:14:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:08,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:08,693 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 29 treesize of output 45 [2022-03-01 18:14:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:08,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248486440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:08,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:08,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 18:14:08,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318373096] [2022-03-01 18:14:08,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:08,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:14:08,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:14:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:14:08,776 INFO L87 Difference]: Start difference. First operand 9615 states and 39372 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:10,182 INFO L93 Difference]: Finished difference Result 30774 states and 123173 transitions. [2022-03-01 18:14:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:14:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:10,452 INFO L225 Difference]: With dead ends: 30774 [2022-03-01 18:14:10,452 INFO L226 Difference]: Without dead ends: 30699 [2022-03-01 18:14:10,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:14:10,453 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 566 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1553 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 927 Invalid, 0 Unknown, 1095 Unchecked, 0.5s Time] [2022-03-01 18:14:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30699 states. [2022-03-01 18:14:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30699 to 12717. [2022-03-01 18:14:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12717 states, 12716 states have (on average 4.13903743315508) internal successors, (52632), 12716 states have internal predecessors, (52632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12717 states to 12717 states and 52632 transitions. [2022-03-01 18:14:11,013 INFO L78 Accepts]: Start accepts. Automaton has 12717 states and 52632 transitions. Word has length 34 [2022-03-01 18:14:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:11,013 INFO L470 AbstractCegarLoop]: Abstraction has 12717 states and 52632 transitions. [2022-03-01 18:14:11,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12717 states and 52632 transitions. [2022-03-01 18:14:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:11,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:11,155 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] [2022-03-01 18:14:11,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:11,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:14:11,356 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1441575100, now seen corresponding path program 6 times [2022-03-01 18:14:11,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:11,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448578772] [2022-03-01 18:14:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:11,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:11,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448578772] [2022-03-01 18:14:11,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448578772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:11,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543485816] [2022-03-01 18:14:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:11,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:11,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:11,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:11,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:14:11,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:14:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:14:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:11,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:11,768 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 54 [2022-03-01 18:14:11,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:14:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:11,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:12,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:12,232 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 22 treesize of output 26 [2022-03-01 18:14:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:12,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:12,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-01 18:14:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:12,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543485816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:12,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:12,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 18:14:12,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233395456] [2022-03-01 18:14:12,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:14:12,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:14:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:14:12,822 INFO L87 Difference]: Start difference. First operand 12717 states and 52632 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:14,469 INFO L93 Difference]: Finished difference Result 38760 states and 154787 transitions. [2022-03-01 18:14:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:14:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:14,725 INFO L225 Difference]: With dead ends: 38760 [2022-03-01 18:14:14,725 INFO L226 Difference]: Without dead ends: 38685 [2022-03-01 18:14:14,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:14:14,726 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 549 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:14,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1857 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1232 Invalid, 0 Unknown, 1105 Unchecked, 0.7s Time] [2022-03-01 18:14:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38685 states. [2022-03-01 18:14:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38685 to 15645. [2022-03-01 18:14:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15644 states have (on average 4.1591025313219125) internal successors, (65065), 15644 states have internal predecessors, (65065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 65065 transitions. [2022-03-01 18:14:15,570 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 65065 transitions. Word has length 34 [2022-03-01 18:14:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:15,570 INFO L470 AbstractCegarLoop]: Abstraction has 15645 states and 65065 transitions. [2022-03-01 18:14:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 65065 transitions. [2022-03-01 18:14:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:15,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:15,613 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] [2022-03-01 18:14:15,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:15,813 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,SelfDestructingSolverStorable15 [2022-03-01 18:14:15,813 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -713739942, now seen corresponding path program 7 times [2022-03-01 18:14:15,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:15,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263516851] [2022-03-01 18:14:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:15,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:15,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263516851] [2022-03-01 18:14:15,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263516851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:15,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350788466] [2022-03-01 18:14:15,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:14:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:15,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:15,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:14:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:15,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:16,222 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:16,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-01 18:14:16,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:14:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:16,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:16,338 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 23 treesize of output 27 [2022-03-01 18:14:16,590 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:16,591 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 32 treesize of output 56 [2022-03-01 18:14:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:16,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350788466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:16,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:16,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:14:16,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599936055] [2022-03-01 18:14:16,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:16,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:14:16,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:14:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:14:16,725 INFO L87 Difference]: Start difference. First operand 15645 states and 65065 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:17,531 INFO L93 Difference]: Finished difference Result 32084 states and 130117 transitions. [2022-03-01 18:14:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:14:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:17,671 INFO L225 Difference]: With dead ends: 32084 [2022-03-01 18:14:17,672 INFO L226 Difference]: Without dead ends: 32081 [2022-03-01 18:14:17,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:14:17,673 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 248 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:17,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 636 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:14:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32081 states. [2022-03-01 18:14:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32081 to 15169. [2022-03-01 18:14:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15169 states, 15168 states have (on average 4.165414029535865) internal successors, (63181), 15168 states have internal predecessors, (63181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15169 states to 15169 states and 63181 transitions. [2022-03-01 18:14:18,548 INFO L78 Accepts]: Start accepts. Automaton has 15169 states and 63181 transitions. Word has length 34 [2022-03-01 18:14:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:18,548 INFO L470 AbstractCegarLoop]: Abstraction has 15169 states and 63181 transitions. [2022-03-01 18:14:18,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15169 states and 63181 transitions. [2022-03-01 18:14:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:18,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:18,598 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] [2022-03-01 18:14:18,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:18,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:18,799 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2086034530, now seen corresponding path program 8 times [2022-03-01 18:14:18,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:18,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355640816] [2022-03-01 18:14:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:18,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:18,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:18,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355640816] [2022-03-01 18:14:18,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355640816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:18,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400321363] [2022-03-01 18:14:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:14:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:18,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:18,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:18,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:14:18,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:14:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:19,270 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 32 treesize of output 26 [2022-03-01 18:14:19,294 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:19,295 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 25 treesize of output 13 [2022-03-01 18:14:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:19,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:19,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:19,395 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 23 treesize of output 27 [2022-03-01 18:14:19,522 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:19,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-01 18:14:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:19,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400321363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:19,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:19,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:14:19,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430589781] [2022-03-01 18:14:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:19,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:14:19,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:14:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:14:19,693 INFO L87 Difference]: Start difference. First operand 15169 states and 63181 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:20,599 INFO L93 Difference]: Finished difference Result 31363 states and 127354 transitions. [2022-03-01 18:14:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:14:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:20,737 INFO L225 Difference]: With dead ends: 31363 [2022-03-01 18:14:20,738 INFO L226 Difference]: Without dead ends: 31208 [2022-03-01 18:14:20,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:14:20,738 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 213 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:20,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 794 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:14:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31208 states. [2022-03-01 18:14:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31208 to 15479. [2022-03-01 18:14:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15479 states, 15478 states have (on average 4.165460653831245) internal successors, (64473), 15478 states have internal predecessors, (64473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15479 states to 15479 states and 64473 transitions. [2022-03-01 18:14:21,510 INFO L78 Accepts]: Start accepts. Automaton has 15479 states and 64473 transitions. Word has length 34 [2022-03-01 18:14:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:21,511 INFO L470 AbstractCegarLoop]: Abstraction has 15479 states and 64473 transitions. [2022-03-01 18:14:21,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 15479 states and 64473 transitions. [2022-03-01 18:14:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:21,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:21,561 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] [2022-03-01 18:14:21,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 18:14:21,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:14:21,769 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash -125437602, now seen corresponding path program 9 times [2022-03-01 18:14:21,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:21,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928765508] [2022-03-01 18:14:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:21,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:21,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:21,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928765508] [2022-03-01 18:14:21,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928765508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:21,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110786407] [2022-03-01 18:14:21,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:14:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:21,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:21,883 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:21,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:14:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:14:21,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:14:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:22,252 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 28 treesize of output 22 [2022-03-01 18:14:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:22,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:22,341 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 37 [2022-03-01 18:14:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:22,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:22,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:22,802 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 22 treesize of output 26 [2022-03-01 18:14:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:23,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:23,063 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 31 treesize of output 39 [2022-03-01 18:14:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:23,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110786407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:23,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:23,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:14:23,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952352944] [2022-03-01 18:14:23,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:23,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:14:23,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:14:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:14:23,170 INFO L87 Difference]: Start difference. First operand 15479 states and 64473 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:25,912 INFO L93 Difference]: Finished difference Result 54106 states and 217691 transitions. [2022-03-01 18:14:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:14:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:26,323 INFO L225 Difference]: With dead ends: 54106 [2022-03-01 18:14:26,323 INFO L226 Difference]: Without dead ends: 53823 [2022-03-01 18:14:26,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=831, Invalid=3591, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:14:26,324 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1298 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:26,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 1400 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 614 Invalid, 0 Unknown, 1218 Unchecked, 0.3s Time] [2022-03-01 18:14:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53823 states. [2022-03-01 18:14:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53823 to 19142. [2022-03-01 18:14:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19142 states, 19141 states have (on average 4.184368632777807) internal successors, (80093), 19141 states have internal predecessors, (80093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19142 states to 19142 states and 80093 transitions. [2022-03-01 18:14:27,513 INFO L78 Accepts]: Start accepts. Automaton has 19142 states and 80093 transitions. Word has length 34 [2022-03-01 18:14:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:27,513 INFO L470 AbstractCegarLoop]: Abstraction has 19142 states and 80093 transitions. [2022-03-01 18:14:27,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 19142 states and 80093 transitions. [2022-03-01 18:14:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:27,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:27,567 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] [2022-03-01 18:14:27,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:27,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:27,768 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2074432168, now seen corresponding path program 10 times [2022-03-01 18:14:27,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:27,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229424373] [2022-03-01 18:14:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:27,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:27,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:27,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229424373] [2022-03-01 18:14:27,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229424373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:27,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668353898] [2022-03-01 18:14:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:14:27,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:27,902 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:27,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:14:27,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:14:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:28,326 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:28,327 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 12 [2022-03-01 18:14:28,411 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 26 treesize of output 20 [2022-03-01 18:14:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:28,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:28,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:28,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 18:14:28,686 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:28,686 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 32 treesize of output 56 [2022-03-01 18:14:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:28,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668353898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:28,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:28,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:14:28,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487689872] [2022-03-01 18:14:28,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:28,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:14:28,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:14:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:14:28,846 INFO L87 Difference]: Start difference. First operand 19142 states and 80093 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:30,090 INFO L93 Difference]: Finished difference Result 40329 states and 163141 transitions. [2022-03-01 18:14:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:14:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:30,266 INFO L225 Difference]: With dead ends: 40329 [2022-03-01 18:14:30,267 INFO L226 Difference]: Without dead ends: 40254 [2022-03-01 18:14:30,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:14:30,267 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 315 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:30,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1045 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:14:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40254 states. [2022-03-01 18:14:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40254 to 19256. [2022-03-01 18:14:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19256 states, 19255 states have (on average 4.183484809140483) internal successors, (80553), 19255 states have internal predecessors, (80553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19256 states to 19256 states and 80553 transitions. [2022-03-01 18:14:31,228 INFO L78 Accepts]: Start accepts. Automaton has 19256 states and 80553 transitions. Word has length 34 [2022-03-01 18:14:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:31,228 INFO L470 AbstractCegarLoop]: Abstraction has 19256 states and 80553 transitions. [2022-03-01 18:14:31,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19256 states and 80553 transitions. [2022-03-01 18:14:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:31,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:31,278 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] [2022-03-01 18:14:31,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:31,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:31,478 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:31,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:31,479 INFO L85 PathProgramCache]: Analyzing trace with hash 779753696, now seen corresponding path program 11 times [2022-03-01 18:14:31,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:31,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413254875] [2022-03-01 18:14:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:31,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:31,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413254875] [2022-03-01 18:14:31,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413254875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:31,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848052894] [2022-03-01 18:14:31,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:14:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:31,595 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:31,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:14:31,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:14:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:14:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:31,928 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 21 treesize of output 17 [2022-03-01 18:14:31,965 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-01 18:14:31,965 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 32 treesize of output 32 [2022-03-01 18:14:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:32,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:32,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:32,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-01 18:14:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:32,814 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 18:14:32,814 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 29 treesize of output 37 [2022-03-01 18:14:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:32,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848052894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:32,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:32,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-01 18:14:32,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949456392] [2022-03-01 18:14:32,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:32,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:14:32,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:14:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:14:32,855 INFO L87 Difference]: Start difference. First operand 19256 states and 80553 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:33,860 INFO L93 Difference]: Finished difference Result 31755 states and 129912 transitions. [2022-03-01 18:14:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:14:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:34,111 INFO L225 Difference]: With dead ends: 31755 [2022-03-01 18:14:34,111 INFO L226 Difference]: Without dead ends: 31716 [2022-03-01 18:14:34,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:14:34,113 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 394 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:34,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 764 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 278 Invalid, 0 Unknown, 520 Unchecked, 0.1s Time] [2022-03-01 18:14:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31716 states. [2022-03-01 18:14:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31716 to 20660. [2022-03-01 18:14:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 4.182051406166804) internal successors, (86397), 20659 states have internal predecessors, (86397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 86397 transitions. [2022-03-01 18:14:35,009 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 86397 transitions. Word has length 34 [2022-03-01 18:14:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:35,009 INFO L470 AbstractCegarLoop]: Abstraction has 20660 states and 86397 transitions. [2022-03-01 18:14:35,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 86397 transitions. [2022-03-01 18:14:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:35,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:35,068 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] [2022-03-01 18:14:35,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 18:14:35,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:35,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 991522436, now seen corresponding path program 12 times [2022-03-01 18:14:35,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:35,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823230072] [2022-03-01 18:14:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:35,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:35,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:35,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823230072] [2022-03-01 18:14:35,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823230072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:35,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677195164] [2022-03-01 18:14:35,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:35,371 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:14:35,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:14:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:14:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:35,848 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 32 treesize of output 26 [2022-03-01 18:14:35,923 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:35,923 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 25 treesize of output 13 [2022-03-01 18:14:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:35,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:35,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:35,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-01 18:14:36,129 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:36,129 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 33 treesize of output 57 [2022-03-01 18:14:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:36,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677195164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:36,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:36,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:14:36,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322425395] [2022-03-01 18:14:36,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:36,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:14:36,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:14:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:14:36,312 INFO L87 Difference]: Start difference. First operand 20660 states and 86397 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:37,201 INFO L93 Difference]: Finished difference Result 36208 states and 148002 transitions. [2022-03-01 18:14:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 18:14:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:37,417 INFO L225 Difference]: With dead ends: 36208 [2022-03-01 18:14:37,417 INFO L226 Difference]: Without dead ends: 36081 [2022-03-01 18:14:37,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:14:37,422 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 270 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:37,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 561 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:14:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36081 states. [2022-03-01 18:14:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36081 to 19626. [2022-03-01 18:14:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 19625 states have (on average 4.1831847133757964) internal successors, (82095), 19625 states have internal predecessors, (82095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 82095 transitions. [2022-03-01 18:14:38,210 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 82095 transitions. Word has length 34 [2022-03-01 18:14:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:38,211 INFO L470 AbstractCegarLoop]: Abstraction has 19626 states and 82095 transitions. [2022-03-01 18:14:38,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 82095 transitions. [2022-03-01 18:14:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:38,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:38,451 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] [2022-03-01 18:14:38,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:38,678 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1277158268, now seen corresponding path program 13 times [2022-03-01 18:14:38,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:38,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668173693] [2022-03-01 18:14:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:38,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:38,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668173693] [2022-03-01 18:14:38,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668173693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:38,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521671013] [2022-03-01 18:14:38,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:14:38,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:38,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:38,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:14:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:39,067 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:39,068 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 44 treesize of output 26 [2022-03-01 18:14:39,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:14:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:39,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:39,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:39,230 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 23 treesize of output 27 [2022-03-01 18:14:39,351 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:39,351 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 32 treesize of output 56 [2022-03-01 18:14:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:39,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521671013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:39,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:39,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:14:39,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601966056] [2022-03-01 18:14:39,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:39,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:14:39,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:14:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:14:39,545 INFO L87 Difference]: Start difference. First operand 19626 states and 82095 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:40,678 INFO L93 Difference]: Finished difference Result 40662 states and 166270 transitions. [2022-03-01 18:14:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:14:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:40,865 INFO L225 Difference]: With dead ends: 40662 [2022-03-01 18:14:40,866 INFO L226 Difference]: Without dead ends: 40587 [2022-03-01 18:14:40,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:14:40,866 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 309 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:40,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 852 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:14:40,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40587 states. [2022-03-01 18:14:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40587 to 21472. [2022-03-01 18:14:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21472 states, 21471 states have (on average 4.188533370592893) internal successors, (89932), 21471 states have internal predecessors, (89932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21472 states to 21472 states and 89932 transitions. [2022-03-01 18:14:41,833 INFO L78 Accepts]: Start accepts. Automaton has 21472 states and 89932 transitions. Word has length 34 [2022-03-01 18:14:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 21472 states and 89932 transitions. [2022-03-01 18:14:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21472 states and 89932 transitions. [2022-03-01 18:14:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:41,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:41,890 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] [2022-03-01 18:14:41,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:42,091 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,SelfDestructingSolverStorable22 [2022-03-01 18:14:42,091 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 611195350, now seen corresponding path program 14 times [2022-03-01 18:14:42,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:42,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676905146] [2022-03-01 18:14:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:42,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:42,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676905146] [2022-03-01 18:14:42,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676905146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:42,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313627111] [2022-03-01 18:14:42,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:14:42,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:42,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:42,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:42,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:14:42,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:14:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:42,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:42,489 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 32 treesize of output 26 [2022-03-01 18:14:42,517 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:42,517 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 25 treesize of output 13 [2022-03-01 18:14:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:42,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:42,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:42,614 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 23 treesize of output 27 [2022-03-01 18:14:42,711 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:42,712 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 32 treesize of output 56 [2022-03-01 18:14:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:42,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313627111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:42,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:42,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:14:42,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684907582] [2022-03-01 18:14:42,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:42,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:14:42,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:14:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:14:42,839 INFO L87 Difference]: Start difference. First operand 21472 states and 89932 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:43,901 INFO L93 Difference]: Finished difference Result 35967 states and 147427 transitions. [2022-03-01 18:14:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:14:43,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:44,077 INFO L225 Difference]: With dead ends: 35967 [2022-03-01 18:14:44,077 INFO L226 Difference]: Without dead ends: 35852 [2022-03-01 18:14:44,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:14:44,078 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 362 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:44,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 734 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:14:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2022-03-01 18:14:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 19950. [2022-03-01 18:14:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19949 states have (on average 4.187377813424232) internal successors, (83534), 19949 states have internal predecessors, (83534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 83534 transitions. [2022-03-01 18:14:45,080 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 83534 transitions. Word has length 34 [2022-03-01 18:14:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:45,081 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 83534 transitions. [2022-03-01 18:14:45,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 83534 transitions. [2022-03-01 18:14:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:45,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:45,129 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] [2022-03-01 18:14:45,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:45,329 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,SelfDestructingSolverStorable23 [2022-03-01 18:14:45,330 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1723175018, now seen corresponding path program 15 times [2022-03-01 18:14:45,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:45,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022689960] [2022-03-01 18:14:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:45,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:45,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022689960] [2022-03-01 18:14:45,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022689960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:45,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138914479] [2022-03-01 18:14:45,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:14:45,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:45,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:45,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:14:45,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:14:45,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:14:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:45,729 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 26 treesize of output 20 [2022-03-01 18:14:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:45,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:45,805 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 37 [2022-03-01 18:14:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:45,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:46,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:46,121 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 22 treesize of output 26 [2022-03-01 18:14:46,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:46,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:46,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:46,278 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 31 treesize of output 39 [2022-03-01 18:14:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:46,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138914479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:46,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:46,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:14:46,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648086267] [2022-03-01 18:14:46,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:46,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:14:46,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:14:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:14:46,421 INFO L87 Difference]: Start difference. First operand 19950 states and 83534 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:47,700 INFO L93 Difference]: Finished difference Result 33562 states and 137398 transitions. [2022-03-01 18:14:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:14:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:47,857 INFO L225 Difference]: With dead ends: 33562 [2022-03-01 18:14:47,857 INFO L226 Difference]: Without dead ends: 33375 [2022-03-01 18:14:47,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:14:47,858 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 642 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:47,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 955 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 432 Invalid, 0 Unknown, 523 Unchecked, 0.2s Time] [2022-03-01 18:14:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33375 states. [2022-03-01 18:14:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33375 to 21342. [2022-03-01 18:14:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21342 states, 21341 states have (on average 4.188135513799728) internal successors, (89379), 21341 states have internal predecessors, (89379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21342 states to 21342 states and 89379 transitions. [2022-03-01 18:14:48,889 INFO L78 Accepts]: Start accepts. Automaton has 21342 states and 89379 transitions. Word has length 34 [2022-03-01 18:14:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 21342 states and 89379 transitions. [2022-03-01 18:14:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21342 states and 89379 transitions. [2022-03-01 18:14:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:48,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:48,945 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] [2022-03-01 18:14:48,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:49,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:49,146 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash 105162736, now seen corresponding path program 16 times [2022-03-01 18:14:49,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:49,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400307546] [2022-03-01 18:14:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:49,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400307546] [2022-03-01 18:14:49,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400307546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:49,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159682600] [2022-03-01 18:14:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:14:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:49,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:14:49,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:14:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:14:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:49,503 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:14:49,503 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 44 treesize of output 26 [2022-03-01 18:14:49,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:14:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:49,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:49,667 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 23 treesize of output 27 [2022-03-01 18:14:49,759 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:49,759 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 32 treesize of output 56 [2022-03-01 18:14:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159682600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:49,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:49,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:14:49,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712197574] [2022-03-01 18:14:49,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:14:49,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:14:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:14:49,928 INFO L87 Difference]: Start difference. First operand 21342 states and 89379 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:51,428 INFO L93 Difference]: Finished difference Result 42875 states and 174962 transitions. [2022-03-01 18:14:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:14:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:14:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:51,628 INFO L225 Difference]: With dead ends: 42875 [2022-03-01 18:14:51,629 INFO L226 Difference]: Without dead ends: 42800 [2022-03-01 18:14:51,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:14:51,629 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 488 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:51,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 922 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:14:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42800 states. [2022-03-01 18:14:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42800 to 22274. [2022-03-01 18:14:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22274 states, 22273 states have (on average 4.190724195213936) internal successors, (93340), 22273 states have internal predecessors, (93340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22274 states to 22274 states and 93340 transitions. [2022-03-01 18:14:52,726 INFO L78 Accepts]: Start accepts. Automaton has 22274 states and 93340 transitions. Word has length 34 [2022-03-01 18:14:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:52,726 INFO L470 AbstractCegarLoop]: Abstraction has 22274 states and 93340 transitions. [2022-03-01 18:14:52,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22274 states and 93340 transitions. [2022-03-01 18:14:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:52,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:52,789 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] [2022-03-01 18:14:52,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:52,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:52,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash 361818198, now seen corresponding path program 17 times [2022-03-01 18:14:52,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:52,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43901169] [2022-03-01 18:14:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:53,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:53,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43901169] [2022-03-01 18:14:53,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43901169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:53,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649611469] [2022-03-01 18:14:53,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:14:53,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:53,103 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:14:53,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:14:53,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:14:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:14:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:53,391 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 34 treesize of output 28 [2022-03-01 18:14:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:53,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:53,438 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 49 treesize of output 53 [2022-03-01 18:14:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:53,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:53,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:53,815 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 28 [2022-03-01 18:14:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:54,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:54,139 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 33 treesize of output 21 [2022-03-01 18:14:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:54,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649611469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:54,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:54,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:14:54,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645606135] [2022-03-01 18:14:54,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:54,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:14:54,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:14:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:14:54,180 INFO L87 Difference]: Start difference. First operand 22274 states and 93340 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:57,373 INFO L93 Difference]: Finished difference Result 75419 states and 305489 transitions. [2022-03-01 18:14:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:14:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:14:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:57,927 INFO L225 Difference]: With dead ends: 75419 [2022-03-01 18:14:57,927 INFO L226 Difference]: Without dead ends: 75064 [2022-03-01 18:14:57,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=903, Invalid=3927, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:14:57,928 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1280 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:57,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1442 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1554 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-03-01 18:14:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75064 states. [2022-03-01 18:14:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75064 to 30624. [2022-03-01 18:14:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30624 states, 30623 states have (on average 4.278156940861444) internal successors, (131010), 30623 states have internal predecessors, (131010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30624 states to 30624 states and 131010 transitions. [2022-03-01 18:14:59,590 INFO L78 Accepts]: Start accepts. Automaton has 30624 states and 131010 transitions. Word has length 34 [2022-03-01 18:14:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:59,590 INFO L470 AbstractCegarLoop]: Abstraction has 30624 states and 131010 transitions. [2022-03-01 18:14:59,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30624 states and 131010 transitions. [2022-03-01 18:14:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:14:59,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:59,671 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] [2022-03-01 18:14:59,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:59,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:14:59,872 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:14:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1881464134, now seen corresponding path program 18 times [2022-03-01 18:14:59,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:59,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246636014] [2022-03-01 18:14:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:00,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:00,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246636014] [2022-03-01 18:15:00,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246636014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:00,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990783888] [2022-03-01 18:15:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:00,266 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:15:00,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:15:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:00,520 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 [2022-03-01 18:15:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:00,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:00,606 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 29 treesize of output 33 [2022-03-01 18:15:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:00,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:01,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:01,011 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 21 treesize of output 25 [2022-03-01 18:15:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:01,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:01,388 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 29 treesize of output 37 [2022-03-01 18:15:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:01,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990783888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:01,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:01,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-01 18:15:01,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068557341] [2022-03-01 18:15:01,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:01,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:15:01,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:15:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:15:01,451 INFO L87 Difference]: Start difference. First operand 30624 states and 131010 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:03,733 INFO L93 Difference]: Finished difference Result 81051 states and 337213 transitions. [2022-03-01 18:15:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:15:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 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 [2022-03-01 18:15:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:04,208 INFO L225 Difference]: With dead ends: 81051 [2022-03-01 18:15:04,208 INFO L226 Difference]: Without dead ends: 80896 [2022-03-01 18:15:04,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:15:04,209 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 875 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1324 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:04,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1145 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 794 Invalid, 0 Unknown, 1324 Unchecked, 0.5s Time] [2022-03-01 18:15:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80896 states. [2022-03-01 18:15:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80896 to 31625. [2022-03-01 18:15:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31625 states, 31624 states have (on average 4.278143182393119) internal successors, (135292), 31624 states have internal predecessors, (135292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31625 states to 31625 states and 135292 transitions. [2022-03-01 18:15:05,844 INFO L78 Accepts]: Start accepts. Automaton has 31625 states and 135292 transitions. Word has length 34 [2022-03-01 18:15:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:05,845 INFO L470 AbstractCegarLoop]: Abstraction has 31625 states and 135292 transitions. [2022-03-01 18:15:05,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31625 states and 135292 transitions. [2022-03-01 18:15:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:05,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:05,925 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] [2022-03-01 18:15:05,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-01 18:15:06,125 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,SelfDestructingSolverStorable27 [2022-03-01 18:15:06,126 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1083213802, now seen corresponding path program 19 times [2022-03-01 18:15:06,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:06,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800427653] [2022-03-01 18:15:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:06,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:06,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800427653] [2022-03-01 18:15:06,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800427653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:06,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851667144] [2022-03-01 18:15:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:06,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:06,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:06,497 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:06,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:15:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:06,774 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 26 treesize of output 20 [2022-03-01 18:15:06,827 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:06,828 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 25 treesize of output 13 [2022-03-01 18:15:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:06,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:06,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:06,934 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 23 treesize of output 27 [2022-03-01 18:15:07,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:07,045 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 32 treesize of output 56 [2022-03-01 18:15:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851667144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:07,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:07,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:15:07,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369935926] [2022-03-01 18:15:07,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:07,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:07,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:07,208 INFO L87 Difference]: Start difference. First operand 31625 states and 135292 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:08,617 INFO L93 Difference]: Finished difference Result 55806 states and 232842 transitions. [2022-03-01 18:15:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:15:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:15:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:08,864 INFO L225 Difference]: With dead ends: 55806 [2022-03-01 18:15:08,864 INFO L226 Difference]: Without dead ends: 55571 [2022-03-01 18:15:08,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:15:08,865 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 355 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:08,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 980 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:15:08,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55571 states. [2022-03-01 18:15:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55571 to 30592. [2022-03-01 18:15:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30592 states, 30591 states have (on average 4.281226504527475) internal successors, (130967), 30591 states have internal predecessors, (130967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30592 states to 30592 states and 130967 transitions. [2022-03-01 18:15:10,211 INFO L78 Accepts]: Start accepts. Automaton has 30592 states and 130967 transitions. Word has length 34 [2022-03-01 18:15:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 30592 states and 130967 transitions. [2022-03-01 18:15:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30592 states and 130967 transitions. [2022-03-01 18:15:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:10,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:10,290 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] [2022-03-01 18:15:10,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:10,490 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,SelfDestructingSolverStorable28 [2022-03-01 18:15:10,491 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1008596802, now seen corresponding path program 20 times [2022-03-01 18:15:10,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:10,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667277035] [2022-03-01 18:15:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:10,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:10,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667277035] [2022-03-01 18:15:10,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667277035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:10,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984000940] [2022-03-01 18:15:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:10,631 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:10,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:15:10,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:10,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:10,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:10,870 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 13 treesize of output 9 [2022-03-01 18:15:10,956 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:10,956 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 25 treesize of output 13 [2022-03-01 18:15:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:10,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:11,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:11,095 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 23 treesize of output 27 [2022-03-01 18:15:11,182 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:11,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-01 18:15:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984000940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:11,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:11,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-01 18:15:11,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639909657] [2022-03-01 18:15:11,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:15:11,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:15:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:15:11,322 INFO L87 Difference]: Start difference. First operand 30592 states and 130967 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:12,684 INFO L93 Difference]: Finished difference Result 51755 states and 215576 transitions. [2022-03-01 18:15:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:15:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:13,133 INFO L225 Difference]: With dead ends: 51755 [2022-03-01 18:15:13,134 INFO L226 Difference]: Without dead ends: 51600 [2022-03-01 18:15:13,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:15:13,135 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 582 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:13,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 686 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51600 states. [2022-03-01 18:15:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51600 to 30829. [2022-03-01 18:15:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30829 states, 30828 states have (on average 4.280134942260283) internal successors, (131948), 30828 states have internal predecessors, (131948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30829 states to 30829 states and 131948 transitions. [2022-03-01 18:15:14,560 INFO L78 Accepts]: Start accepts. Automaton has 30829 states and 131948 transitions. Word has length 34 [2022-03-01 18:15:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:14,560 INFO L470 AbstractCegarLoop]: Abstraction has 30829 states and 131948 transitions. [2022-03-01 18:15:14,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 30829 states and 131948 transitions. [2022-03-01 18:15:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:14,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:14,642 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] [2022-03-01 18:15:14,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:14,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:14,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash -273716218, now seen corresponding path program 21 times [2022-03-01 18:15:14,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:14,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472742495] [2022-03-01 18:15:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:14,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472742495] [2022-03-01 18:15:14,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472742495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:14,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642459048] [2022-03-01 18:15:14,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:14,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:14,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:14,954 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:14,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:15:14,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:15:14,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:15:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:15,155 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 13 treesize of output 9 [2022-03-01 18:15:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:15,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:15,240 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 37 [2022-03-01 18:15:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:15,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:15,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:15,533 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 21 treesize of output 25 [2022-03-01 18:15:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:15,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:15,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:15,687 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 30 treesize of output 36 [2022-03-01 18:15:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:15,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642459048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:15,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:15,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:15:15,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269989376] [2022-03-01 18:15:15,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:15,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:15:15,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:15:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:15:15,800 INFO L87 Difference]: Start difference. First operand 30829 states and 131948 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:16,826 INFO L93 Difference]: Finished difference Result 43107 states and 181657 transitions. [2022-03-01 18:15:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:15:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:16,986 INFO L225 Difference]: With dead ends: 43107 [2022-03-01 18:15:16,987 INFO L226 Difference]: Without dead ends: 42952 [2022-03-01 18:15:16,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:15:16,987 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 678 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:16,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 770 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 370 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2022-03-01 18:15:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42952 states. [2022-03-01 18:15:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42952 to 31184. [2022-03-01 18:15:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31184 states, 31183 states have (on average 4.281339191225989) internal successors, (133505), 31183 states have internal predecessors, (133505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31184 states to 31184 states and 133505 transitions. [2022-03-01 18:15:18,226 INFO L78 Accepts]: Start accepts. Automaton has 31184 states and 133505 transitions. Word has length 34 [2022-03-01 18:15:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:18,226 INFO L470 AbstractCegarLoop]: Abstraction has 31184 states and 133505 transitions. [2022-03-01 18:15:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31184 states and 133505 transitions. [2022-03-01 18:15:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:18,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:18,302 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] [2022-03-01 18:15:18,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:18,504 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -713242418, now seen corresponding path program 22 times [2022-03-01 18:15:18,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:18,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655134764] [2022-03-01 18:15:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:18,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:18,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655134764] [2022-03-01 18:15:18,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655134764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:18,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768023983] [2022-03-01 18:15:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:18,603 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:18,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:15:18,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:18,896 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:18,896 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 44 treesize of output 26 [2022-03-01 18:15:18,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:15:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:18,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:19,050 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:19,051 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 29 treesize of output 53 [2022-03-01 18:15:19,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:19,170 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 22 treesize of output 26 [2022-03-01 18:15:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768023983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:19,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:19,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:15:19,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719384132] [2022-03-01 18:15:19,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:19,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:19,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:19,219 INFO L87 Difference]: Start difference. First operand 31184 states and 133505 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:20,842 INFO L93 Difference]: Finished difference Result 51124 states and 214336 transitions. [2022-03-01 18:15:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:15:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:15:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:21,058 INFO L225 Difference]: With dead ends: 51124 [2022-03-01 18:15:21,058 INFO L226 Difference]: Without dead ends: 51049 [2022-03-01 18:15:21,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:15:21,059 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 289 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:21,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1598 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:15:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2022-03-01 18:15:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 33125. [2022-03-01 18:15:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33125 states, 33124 states have (on average 4.282061345248159) internal successors, (141839), 33124 states have internal predecessors, (141839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33125 states to 33125 states and 141839 transitions. [2022-03-01 18:15:22,357 INFO L78 Accepts]: Start accepts. Automaton has 33125 states and 141839 transitions. Word has length 34 [2022-03-01 18:15:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:22,358 INFO L470 AbstractCegarLoop]: Abstraction has 33125 states and 141839 transitions. [2022-03-01 18:15:22,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33125 states and 141839 transitions. [2022-03-01 18:15:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:22,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:22,442 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] [2022-03-01 18:15:22,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:22,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:22,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1379205336, now seen corresponding path program 23 times [2022-03-01 18:15:22,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:22,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049608874] [2022-03-01 18:15:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:22,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:22,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049608874] [2022-03-01 18:15:22,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049608874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:22,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012776678] [2022-03-01 18:15:22,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:22,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:22,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:22,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:22,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:15:22,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:15:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:23,478 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 23 treesize of output 15 [2022-03-01 18:15:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,533 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 18 treesize of output 10 [2022-03-01 18:15:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:23,747 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 26 treesize of output 50 [2022-03-01 18:15:23,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:23,849 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 23 treesize of output 27 [2022-03-01 18:15:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:23,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012776678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:23,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:23,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-01 18:15:23,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215635305] [2022-03-01 18:15:23,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:23,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:23,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:23,927 INFO L87 Difference]: Start difference. First operand 33125 states and 141839 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:24,567 INFO L93 Difference]: Finished difference Result 46443 states and 194219 transitions. [2022-03-01 18:15:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:15:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:25,000 INFO L225 Difference]: With dead ends: 46443 [2022-03-01 18:15:25,000 INFO L226 Difference]: Without dead ends: 46334 [2022-03-01 18:15:25,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:15:25,001 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 271 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:25,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 754 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 403 Invalid, 0 Unknown, 474 Unchecked, 0.2s Time] [2022-03-01 18:15:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46334 states. [2022-03-01 18:15:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46334 to 34272. [2022-03-01 18:15:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 4.281287385836421) internal successors, (146724), 34271 states have internal predecessors, (146724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 146724 transitions. [2022-03-01 18:15:25,990 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 146724 transitions. Word has length 34 [2022-03-01 18:15:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:25,991 INFO L470 AbstractCegarLoop]: Abstraction has 34272 states and 146724 transitions. [2022-03-01 18:15:25,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 146724 transitions. [2022-03-01 18:15:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:26,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:26,350 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] [2022-03-01 18:15:26,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:26,555 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,SelfDestructingSolverStorable32 [2022-03-01 18:15:26,556 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1167436596, now seen corresponding path program 24 times [2022-03-01 18:15:26,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:26,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604182764] [2022-03-01 18:15:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:26,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:26,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604182764] [2022-03-01 18:15:26,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604182764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:26,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776701960] [2022-03-01 18:15:26,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:26,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:26,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:26,651 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:26,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:15:26,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:15:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:26,984 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 34 treesize of output 28 [2022-03-01 18:15:27,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:27,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:27,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-03-01 18:15:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:27,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:27,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:27,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:27,428 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 28 treesize of output 36 [2022-03-01 18:15:27,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:27,495 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 33 [2022-03-01 18:15:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:27,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776701960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:27,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:27,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:15:27,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067040835] [2022-03-01 18:15:27,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:27,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:15:27,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:15:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:15:27,591 INFO L87 Difference]: Start difference. First operand 34272 states and 146724 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:28,975 INFO L93 Difference]: Finished difference Result 60838 states and 255565 transitions. [2022-03-01 18:15:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:15:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:29,214 INFO L225 Difference]: With dead ends: 60838 [2022-03-01 18:15:29,214 INFO L226 Difference]: Without dead ends: 60783 [2022-03-01 18:15:29,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:15:29,215 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 362 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:29,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 975 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 636 Invalid, 0 Unknown, 513 Unchecked, 0.3s Time] [2022-03-01 18:15:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60783 states. [2022-03-01 18:15:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60783 to 36380. [2022-03-01 18:15:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36380 states, 36379 states have (on average 4.277055444074878) internal successors, (155595), 36379 states have internal predecessors, (155595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36380 states to 36380 states and 155595 transitions. [2022-03-01 18:15:30,579 INFO L78 Accepts]: Start accepts. Automaton has 36380 states and 155595 transitions. Word has length 34 [2022-03-01 18:15:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 36380 states and 155595 transitions. [2022-03-01 18:15:30,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 36380 states and 155595 transitions. [2022-03-01 18:15:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:30,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:30,660 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] [2022-03-01 18:15:30,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:30,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:30,861 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1588245140, now seen corresponding path program 25 times [2022-03-01 18:15:30,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:30,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312920442] [2022-03-01 18:15:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:30,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:30,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312920442] [2022-03-01 18:15:30,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312920442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:30,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031427232] [2022-03-01 18:15:30,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:30,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:30,957 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:30,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:15:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:31,625 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 32 treesize of output 26 [2022-03-01 18:15:31,660 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:31,660 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 25 treesize of output 13 [2022-03-01 18:15:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:31,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:31,785 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:31,785 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 29 treesize of output 53 [2022-03-01 18:15:31,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:31,896 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 22 treesize of output 26 [2022-03-01 18:15:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:31,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031427232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:31,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:31,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:15:31,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985444547] [2022-03-01 18:15:31,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:31,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:31,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:31,943 INFO L87 Difference]: Start difference. First operand 36380 states and 155595 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:32,785 INFO L93 Difference]: Finished difference Result 57642 states and 242703 transitions. [2022-03-01 18:15:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 [2022-03-01 18:15:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:33,323 INFO L225 Difference]: With dead ends: 57642 [2022-03-01 18:15:33,323 INFO L226 Difference]: Without dead ends: 57349 [2022-03-01 18:15:33,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:15:33,324 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 242 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:33,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 710 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57349 states. [2022-03-01 18:15:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57349 to 32247. [2022-03-01 18:15:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32247 states, 32246 states have (on average 4.284531414749116) internal successors, (138159), 32246 states have internal predecessors, (138159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32247 states to 32247 states and 138159 transitions. [2022-03-01 18:15:34,380 INFO L78 Accepts]: Start accepts. Automaton has 32247 states and 138159 transitions. Word has length 34 [2022-03-01 18:15:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:34,380 INFO L470 AbstractCegarLoop]: Abstraction has 32247 states and 138159 transitions. [2022-03-01 18:15:34,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32247 states and 138159 transitions. [2022-03-01 18:15:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:34,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:34,741 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] [2022-03-01 18:15:34,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:34,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:34,955 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash 581391592, now seen corresponding path program 26 times [2022-03-01 18:15:34,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:34,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743959848] [2022-03-01 18:15:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:35,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:35,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743959848] [2022-03-01 18:15:35,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743959848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:35,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300923420] [2022-03-01 18:15:35,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:35,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:35,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:35,039 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:35,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:15:35,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:35,277 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 26 treesize of output 20 [2022-03-01 18:15:35,328 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:35,329 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 25 treesize of output 13 [2022-03-01 18:15:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:35,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:35,448 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:35,448 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 29 treesize of output 53 [2022-03-01 18:15:35,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:35,568 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 22 treesize of output 26 [2022-03-01 18:15:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:35,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300923420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:35,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:35,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:15:35,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493231268] [2022-03-01 18:15:35,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:35,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:15:35,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:15:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:15:35,610 INFO L87 Difference]: Start difference. First operand 32247 states and 138159 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:36,741 INFO L93 Difference]: Finished difference Result 56489 states and 237471 transitions. [2022-03-01 18:15:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:15:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 [2022-03-01 18:15:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:36,971 INFO L225 Difference]: With dead ends: 56489 [2022-03-01 18:15:36,972 INFO L226 Difference]: Without dead ends: 56254 [2022-03-01 18:15:36,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:15:36,972 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 233 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:36,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 782 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:15:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56254 states. [2022-03-01 18:15:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56254 to 31835. [2022-03-01 18:15:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-03-01 18:15:38,276 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-03-01 18:15:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:38,277 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-03-01 18:15:38,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-03-01 18:15:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:38,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:38,349 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] [2022-03-01 18:15:38,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:38,549 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,SelfDestructingSolverStorable35 [2022-03-01 18:15:38,549 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash -108936552, now seen corresponding path program 27 times [2022-03-01 18:15:38,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:38,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171274751] [2022-03-01 18:15:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:38,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171274751] [2022-03-01 18:15:38,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171274751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338087835] [2022-03-01 18:15:38,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:38,650 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:38,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:15:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:15:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:38,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:15:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:38,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:38,917 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 37 [2022-03-01 18:15:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:39,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:39,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:39,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:39,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2022-03-01 18:15:39,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:39,344 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 39 [2022-03-01 18:15:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338087835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:39,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:39,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-01 18:15:39,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853391437] [2022-03-01 18:15:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:39,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:15:39,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:15:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:15:39,450 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:40,762 INFO L93 Difference]: Finished difference Result 54089 states and 227094 transitions. [2022-03-01 18:15:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:15:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:40,978 INFO L225 Difference]: With dead ends: 54089 [2022-03-01 18:15:40,978 INFO L226 Difference]: Without dead ends: 53974 [2022-03-01 18:15:40,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:15:40,978 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 528 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:40,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 978 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 964 Invalid, 0 Unknown, 421 Unchecked, 0.5s Time] [2022-03-01 18:15:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53974 states. [2022-03-01 18:15:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53974 to 31835. [2022-03-01 18:15:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-03-01 18:15:42,221 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-03-01 18:15:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:42,221 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-03-01 18:15:42,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-03-01 18:15:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:42,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:42,290 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] [2022-03-01 18:15:42,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:15:42,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:15:42,491 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash -981803884, now seen corresponding path program 28 times [2022-03-01 18:15:42,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:42,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160575075] [2022-03-01 18:15:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:42,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160575075] [2022-03-01 18:15:42,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160575075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:42,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754235164] [2022-03-01 18:15:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:42,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:42,611 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:42,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:15:42,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:42,804 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 13 treesize of output 9 [2022-03-01 18:15:42,881 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:42,881 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 25 treesize of output 13 [2022-03-01 18:15:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:43,044 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:43,044 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 29 treesize of output 53 [2022-03-01 18:15:43,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:43,392 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 22 treesize of output 26 [2022-03-01 18:15:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:43,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754235164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:43,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:43,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-01 18:15:43,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132920039] [2022-03-01 18:15:43,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:43,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:15:43,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:43,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:15:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:15:43,440 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:44,581 INFO L93 Difference]: Finished difference Result 54606 states and 227432 transitions. [2022-03-01 18:15:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:15:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:45,070 INFO L225 Difference]: With dead ends: 54606 [2022-03-01 18:15:45,070 INFO L226 Difference]: Without dead ends: 54451 [2022-03-01 18:15:45,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:15:45,070 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 446 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:45,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 910 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:15:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54451 states. [2022-03-01 18:15:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54451 to 31835. [2022-03-01 18:15:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-03-01 18:15:46,177 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-03-01 18:15:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:46,177 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-03-01 18:15:46,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-03-01 18:15:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:46,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:46,532 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] [2022-03-01 18:15:46,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:15:46,733 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2030850392, now seen corresponding path program 29 times [2022-03-01 18:15:46,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:46,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727835207] [2022-03-01 18:15:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:46,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:46,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727835207] [2022-03-01 18:15:46,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727835207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:46,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589919278] [2022-03-01 18:15:46,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:46,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:46,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:46,839 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:46,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:15:46,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:46,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:15:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:47,002 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 13 treesize of output 9 [2022-03-01 18:15:47,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:47,092 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 13 treesize of output 17 [2022-03-01 18:15:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:47,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:47,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:47,535 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 26 treesize of output 42 [2022-03-01 18:15:47,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:47,592 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 23 treesize of output 27 [2022-03-01 18:15:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:47,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589919278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:47,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:47,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-01 18:15:47,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867812481] [2022-03-01 18:15:47,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:47,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:15:47,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:47,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:15:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:15:47,635 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:49,263 INFO L93 Difference]: Finished difference Result 69131 states and 291724 transitions. [2022-03-01 18:15:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:15:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:15:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:49,550 INFO L225 Difference]: With dead ends: 69131 [2022-03-01 18:15:49,550 INFO L226 Difference]: Without dead ends: 68953 [2022-03-01 18:15:49,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:15:49,551 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 642 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1205 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 760 Invalid, 0 Unknown, 468 Unchecked, 0.4s Time] [2022-03-01 18:15:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68953 states. [2022-03-01 18:15:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68953 to 32599. [2022-03-01 18:15:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32599 states, 32598 states have (on average 4.282870114730965) internal successors, (139613), 32598 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32599 states to 32599 states and 139613 transitions. [2022-03-01 18:15:50,976 INFO L78 Accepts]: Start accepts. Automaton has 32599 states and 139613 transitions. Word has length 34 [2022-03-01 18:15:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:50,976 INFO L470 AbstractCegarLoop]: Abstraction has 32599 states and 139613 transitions. [2022-03-01 18:15:50,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32599 states and 139613 transitions. [2022-03-01 18:15:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:51,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:51,056 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] [2022-03-01 18:15:51,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:51,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:15:51,257 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash -436137612, now seen corresponding path program 30 times [2022-03-01 18:15:51,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:51,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503749117] [2022-03-01 18:15:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:51,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503749117] [2022-03-01 18:15:51,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503749117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:51,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021570945] [2022-03-01 18:15:51,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:51,364 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:51,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:15:51,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:15:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:15:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:51,564 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 13 treesize of output 9 [2022-03-01 18:15:51,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:51,652 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 13 treesize of output 17 [2022-03-01 18:15:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:51,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:52,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:52,298 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 26 treesize of output 42 [2022-03-01 18:15:52,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:52,387 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 23 treesize of output 27 [2022-03-01 18:15:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:52,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021570945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:52,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:52,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-01 18:15:52,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581113310] [2022-03-01 18:15:52,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:52,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:15:52,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:15:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:15:52,433 INFO L87 Difference]: Start difference. First operand 32599 states and 139613 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:54,197 INFO L93 Difference]: Finished difference Result 68380 states and 286635 transitions. [2022-03-01 18:15:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:15:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:15:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:54,557 INFO L225 Difference]: With dead ends: 68380 [2022-03-01 18:15:54,558 INFO L226 Difference]: Without dead ends: 68170 [2022-03-01 18:15:54,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:15:54,558 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 616 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:54,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1221 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1055 Invalid, 0 Unknown, 364 Unchecked, 0.4s Time] [2022-03-01 18:15:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68170 states. [2022-03-01 18:15:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68170 to 32345. [2022-03-01 18:15:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32345 states, 32344 states have (on average 4.285091516200841) internal successors, (138597), 32344 states have internal predecessors, (138597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32345 states to 32345 states and 138597 transitions. [2022-03-01 18:15:56,254 INFO L78 Accepts]: Start accepts. Automaton has 32345 states and 138597 transitions. Word has length 34 [2022-03-01 18:15:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:56,255 INFO L470 AbstractCegarLoop]: Abstraction has 32345 states and 138597 transitions. [2022-03-01 18:15:56,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 32345 states and 138597 transitions. [2022-03-01 18:15:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:15:56,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:56,344 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] [2022-03-01 18:15:56,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:56,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:15:56,545 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:15:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash 105520768, now seen corresponding path program 31 times [2022-03-01 18:15:56,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:56,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694669986] [2022-03-01 18:15:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:56,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:56,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694669986] [2022-03-01 18:15:56,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694669986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:56,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758563298] [2022-03-01 18:15:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:56,662 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:15:56,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:15:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:56,832 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 13 treesize of output 9 [2022-03-01 18:15:56,964 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:15:56,965 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 25 treesize of output 13 [2022-03-01 18:15:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:56,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:57,106 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:57,106 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 26 treesize of output 50 [2022-03-01 18:15:57,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:57,233 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 22 treesize of output 26 [2022-03-01 18:15:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:57,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758563298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:57,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:57,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:15:57,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058667425] [2022-03-01 18:15:57,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:57,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:15:57,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:15:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:15:57,286 INFO L87 Difference]: Start difference. First operand 32345 states and 138597 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:58,349 INFO L93 Difference]: Finished difference Result 50853 states and 213215 transitions. [2022-03-01 18:15:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:15:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:15:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:58,583 INFO L225 Difference]: With dead ends: 50853 [2022-03-01 18:15:58,583 INFO L226 Difference]: Without dead ends: 50698 [2022-03-01 18:15:58,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:15:58,583 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 427 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:58,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 512 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:15:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2022-03-01 18:15:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 32365. [2022-03-01 18:15:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32365 states, 32364 states have (on average 4.284977135088369) internal successors, (138679), 32364 states have internal predecessors, (138679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32365 states to 32365 states and 138679 transitions. [2022-03-01 18:16:00,133 INFO L78 Accepts]: Start accepts. Automaton has 32365 states and 138679 transitions. Word has length 34 [2022-03-01 18:16:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:00,133 INFO L470 AbstractCegarLoop]: Abstraction has 32365 states and 138679 transitions. [2022-03-01 18:16:00,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32365 states and 138679 transitions. [2022-03-01 18:16:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:16:00,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:00,224 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] [2022-03-01 18:16:00,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 18:16:00,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-01 18:16:00,425 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:16:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1298836420, now seen corresponding path program 32 times [2022-03-01 18:16:00,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:00,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573024516] [2022-03-01 18:16:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:00,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:00,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573024516] [2022-03-01 18:16:00,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573024516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:00,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737568231] [2022-03-01 18:16:00,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:00,507 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:00,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:16:00,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:16:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:00,642 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 13 treesize of output 9 [2022-03-01 18:16:00,747 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:16:00,748 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 25 treesize of output 13 [2022-03-01 18:16:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:00,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:00,866 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:16:00,866 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 26 treesize of output 50 [2022-03-01 18:16:01,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:01,002 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 22 treesize of output 26 [2022-03-01 18:16:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:01,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737568231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:01,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:01,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:16:01,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719903683] [2022-03-01 18:16:01,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:01,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:16:01,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:01,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:16:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:16:01,047 INFO L87 Difference]: Start difference. First operand 32365 states and 138679 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:02,085 INFO L93 Difference]: Finished difference Result 51295 states and 215180 transitions. [2022-03-01 18:16:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:16:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 18:16:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:02,323 INFO L225 Difference]: With dead ends: 51295 [2022-03-01 18:16:02,324 INFO L226 Difference]: Without dead ends: 51140 [2022-03-01 18:16:02,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:02,324 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 422 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:02,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 602 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:16:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51140 states. [2022-03-01 18:16:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51140 to 32602. [2022-03-01 18:16:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32602 states, 32601 states have (on average 4.283917671237079) internal successors, (139660), 32601 states have internal predecessors, (139660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32602 states to 32602 states and 139660 transitions. [2022-03-01 18:16:03,844 INFO L78 Accepts]: Start accepts. Automaton has 32602 states and 139660 transitions. Word has length 34 [2022-03-01 18:16:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:03,844 INFO L470 AbstractCegarLoop]: Abstraction has 32602 states and 139660 transitions. [2022-03-01 18:16:03,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32602 states and 139660 transitions. [2022-03-01 18:16:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 18:16:03,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:03,933 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:03,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:04,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 18:16:04,134 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:16:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash -119249945, now seen corresponding path program 8 times [2022-03-01 18:16:04,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:04,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832218631] [2022-03-01 18:16:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:04,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:04,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832218631] [2022-03-01 18:16:04,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832218631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:04,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166673471] [2022-03-01 18:16:04,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:04,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:04,201 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:04,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:16:04,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 18:16:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:04,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166673471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:04,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:04,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 10 [2022-03-01 18:16:04,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487084113] [2022-03-01 18:16:04,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:04,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:16:04,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:16:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:16:04,346 INFO L87 Difference]: Start difference. First operand 32602 states and 139660 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) [2022-03-01 18:16:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:05,124 INFO L93 Difference]: Finished difference Result 51748 states and 220299 transitions. [2022-03-01 18:16:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:16:05,125 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 36 [2022-03-01 18:16:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:05,382 INFO L225 Difference]: With dead ends: 51748 [2022-03-01 18:16:05,382 INFO L226 Difference]: Without dead ends: 50880 [2022-03-01 18:16:05,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:16:05,383 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 189 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:05,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 178 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:16:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50880 states. [2022-03-01 18:16:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50880 to 45321. [2022-03-01 18:16:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 4.279435127978817) internal successors, (193944), 45320 states have internal predecessors, (193944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 193944 transitions. [2022-03-01 18:16:07,100 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 193944 transitions. Word has length 36 [2022-03-01 18:16:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:07,101 INFO L470 AbstractCegarLoop]: Abstraction has 45321 states and 193944 transitions. [2022-03-01 18:16:07,101 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) [2022-03-01 18:16:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 193944 transitions. [2022-03-01 18:16:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 18:16:07,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:07,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:07,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:07,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 18:16:07,418 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:16:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1081167290, now seen corresponding path program 33 times [2022-03-01 18:16:07,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:07,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045922640] [2022-03-01 18:16:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 18:16:07,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:07,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045922640] [2022-03-01 18:16:07,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045922640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:16:07,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:16:07,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:16:07,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546102454] [2022-03-01 18:16:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:16:07,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:16:07,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:16:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:16:07,452 INFO L87 Difference]: Start difference. First operand 45321 states and 193944 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) [2022-03-01 18:16:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:08,357 INFO L93 Difference]: Finished difference Result 73910 states and 314768 transitions. [2022-03-01 18:16:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:16:08,358 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 36 [2022-03-01 18:16:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:09,071 INFO L225 Difference]: With dead ends: 73910 [2022-03-01 18:16:09,071 INFO L226 Difference]: Without dead ends: 73204 [2022-03-01 18:16:09,071 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 [2022-03-01 18:16:09,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:09,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:16:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73204 states. [2022-03-01 18:16:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73204 to 69123. [2022-03-01 18:16:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69123 states, 69122 states have (on average 4.292772199878476) internal successors, (296725), 69122 states have internal predecessors, (296725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)