/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/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:17:32,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:17:32,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:17:33,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:17:33,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:17:33,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:17:33,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:17:33,060 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 18:17:33,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:17:33,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:17:33,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:17:33,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:17:33,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:17:33,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:17:33,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:17:33,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:17:33,085 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:17:33,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:17:33,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:17:33,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:33,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:17:33,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:17:33,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:17:33,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:17:33,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:17:33,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:17:33,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:17:33,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:17:33,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:17:33,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:17:33,320 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:17:33,321 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:17:33,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2022-03-01 18:17:33,322 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2022-03-01 18:17:33,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:17:33,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:17:33,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:33,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:17:33,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:17:33,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,387 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:17:33,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:33,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:17:33,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:17:33,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:17:33,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:17:33,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:17:33,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:17:33,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:17:33,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/1) ... [2022-03-01 18:17:33,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:33,436 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 18:17:33,458 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 18:17:33,464 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:17:33,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:17:33,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:17:33,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:17:33,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:17:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:17:33,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:17:33,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:17:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:17:33,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:17:33,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:17:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:17:33,466 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 18:17:33,499 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:17:33,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:17:33,566 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:17:33,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:17:33,577 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:17:33,579 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:33 BoogieIcfgContainer [2022-03-01 18:17:33,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:17:33,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:17:33,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:17:33,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:17:33,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:33" (1/2) ... [2022-03-01 18:17:33,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b648c72 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:17:33, skipping insertion in model container [2022-03-01 18:17:33,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:33" (2/2) ... [2022-03-01 18:17:33,584 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2022-03-01 18:17:33,587 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:17:33,587 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:17:33,587 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:17:33,587 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:17:33,608 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:17:33,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:17:33,640 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 18:17:33,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:17:33,646 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2022-03-01 18:17:33,666 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 18:17:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 18:17:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:17:33,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:33,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:33,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash -511251252, now seen corresponding path program 1 times [2022-03-01 18:17:33,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:33,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732476637] [2022-03-01 18:17:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:33,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:33,909 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 18:17:33,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:33,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732476637] [2022-03-01 18:17:33,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732476637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:33,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:33,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 18:17:33,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412538075] [2022-03-01 18:17:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:33,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:17:33,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:17:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:17:33,958 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 18:17:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:34,019 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2022-03-01 18:17:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:17:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:17:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:34,044 INFO L225 Difference]: With dead ends: 215 [2022-03-01 18:17:34,044 INFO L226 Difference]: Without dead ends: 200 [2022-03-01 18:17:34,046 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 18:17:34,058 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:34,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-01 18:17:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-03-01 18:17:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 18:17:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2022-03-01 18:17:34,108 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2022-03-01 18:17:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:34,109 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2022-03-01 18:17:34,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 18:17:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2022-03-01 18:17:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:34,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:34,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:34,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:17:34,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 74019820, now seen corresponding path program 1 times [2022-03-01 18:17:34,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:34,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670774618] [2022-03-01 18:17:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:34,165 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 18:17:34,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:34,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670774618] [2022-03-01 18:17:34,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670774618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:34,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618394613] [2022-03-01 18:17:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:34,176 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 18:17:34,192 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 18:17:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:17:34,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:34,342 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 18:17:34,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:34,405 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 18:17:34,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618394613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:34,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:34,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 18:17:34,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492430815] [2022-03-01 18:17:34,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:34,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:34,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:34,409 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:34,511 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2022-03-01 18:17:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:34,514 INFO L225 Difference]: With dead ends: 345 [2022-03-01 18:17:34,514 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 18:17:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:34,516 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 18:17:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2022-03-01 18:17:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 18:17:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2022-03-01 18:17:34,531 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2022-03-01 18:17:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:34,531 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2022-03-01 18:17:34,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2022-03-01 18:17:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:34,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:34,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:34,578 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 18:17:34,757 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 18:17:34,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 132722862, now seen corresponding path program 1 times [2022-03-01 18:17:34,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:34,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397837224] [2022-03-01 18:17:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:34,790 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 18:17:34,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:34,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397837224] [2022-03-01 18:17:34,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397837224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:34,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:34,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:34,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956018373] [2022-03-01 18:17:34,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:34,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:34,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:34,793 INFO L87 Difference]: Start difference. First operand 174 states and 511 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:34,848 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2022-03-01 18:17:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:34,851 INFO L225 Difference]: With dead ends: 242 [2022-03-01 18:17:34,851 INFO L226 Difference]: Without dead ends: 232 [2022-03-01 18:17:34,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:34,852 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:34,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-01 18:17:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2022-03-01 18:17:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 18:17:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2022-03-01 18:17:34,864 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2022-03-01 18:17:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:34,865 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2022-03-01 18:17:34,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2022-03-01 18:17:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:34,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:34,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:34,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:17:34,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1683104426, now seen corresponding path program 1 times [2022-03-01 18:17:34,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:34,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519030168] [2022-03-01 18:17:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:34,899 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 18:17:34,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:34,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519030168] [2022-03-01 18:17:34,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519030168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:34,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:34,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:34,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544055565] [2022-03-01 18:17:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:34,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:34,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:34,902 INFO L87 Difference]: Start difference. First operand 190 states and 537 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:34,958 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2022-03-01 18:17:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:34,961 INFO L225 Difference]: With dead ends: 325 [2022-03-01 18:17:34,961 INFO L226 Difference]: Without dead ends: 307 [2022-03-01 18:17:34,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:34,962 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:34,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-01 18:17:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2022-03-01 18:17:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 18:17:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2022-03-01 18:17:34,974 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2022-03-01 18:17:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:34,974 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2022-03-01 18:17:34,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2022-03-01 18:17:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:34,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:34,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:34,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:17:34,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:34,977 INFO L85 PathProgramCache]: Analyzing trace with hash 105060458, now seen corresponding path program 2 times [2022-03-01 18:17:34,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:34,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124111927] [2022-03-01 18:17:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,020 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 18:17:35,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124111927] [2022-03-01 18:17:35,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124111927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:35,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:35,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:17:35,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337276318] [2022-03-01 18:17:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:17:35,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:17:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:35,023 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,082 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2022-03-01 18:17:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,084 INFO L225 Difference]: With dead ends: 277 [2022-03-01 18:17:35,084 INFO L226 Difference]: Without dead ends: 265 [2022-03-01 18:17:35,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:35,086 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-01 18:17:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2022-03-01 18:17:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 18:17:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2022-03-01 18:17:35,094 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2022-03-01 18:17:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,094 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2022-03-01 18:17:35,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2022-03-01 18:17:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:35,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:35,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:17:35,095 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 671200524, now seen corresponding path program 2 times [2022-03-01 18:17:35,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203807309] [2022-03-01 18:17:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,120 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 18:17:35,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203807309] [2022-03-01 18:17:35,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203807309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:35,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:35,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:35,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577496115] [2022-03-01 18:17:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:35,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:35,122 INFO L87 Difference]: Start difference. First operand 212 states and 598 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,172 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2022-03-01 18:17:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:35,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,174 INFO L225 Difference]: With dead ends: 275 [2022-03-01 18:17:35,174 INFO L226 Difference]: Without dead ends: 261 [2022-03-01 18:17:35,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:35,175 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-01 18:17:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2022-03-01 18:17:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 18:17:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2022-03-01 18:17:35,182 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2022-03-01 18:17:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,182 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2022-03-01 18:17:35,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2022-03-01 18:17:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:35,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 18:17:35,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash -945431028, now seen corresponding path program 3 times [2022-03-01 18:17:35,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846716494] [2022-03-01 18:17:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,221 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 18:17:35,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846716494] [2022-03-01 18:17:35,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846716494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:35,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:35,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:35,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820601095] [2022-03-01 18:17:35,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:35,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:35,223 INFO L87 Difference]: Start difference. First operand 215 states and 610 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,253 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2022-03-01 18:17:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:17:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,255 INFO L225 Difference]: With dead ends: 222 [2022-03-01 18:17:35,255 INFO L226 Difference]: Without dead ends: 222 [2022-03-01 18:17:35,255 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 18:17:35,256 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-01 18:17:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2022-03-01 18:17:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 18:17:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2022-03-01 18:17:35,264 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2022-03-01 18:17:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,264 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2022-03-01 18:17:35,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2022-03-01 18:17:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:35,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:35,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 18:17:35,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2121095062, now seen corresponding path program 4 times [2022-03-01 18:17:35,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651350453] [2022-03-01 18:17:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,300 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 18:17:35,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651350453] [2022-03-01 18:17:35,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651350453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:35,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:35,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:35,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815592159] [2022-03-01 18:17:35,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:35,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:35,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:35,302 INFO L87 Difference]: Start difference. First operand 213 states and 608 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,345 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2022-03-01 18:17:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:17:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,347 INFO L225 Difference]: With dead ends: 226 [2022-03-01 18:17:35,347 INFO L226 Difference]: Without dead ends: 226 [2022-03-01 18:17:35,347 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 18:17:35,348 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-01 18:17:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2022-03-01 18:17:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 18:17:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2022-03-01 18:17:35,354 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2022-03-01 18:17:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,355 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2022-03-01 18:17:35,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2022-03-01 18:17:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:35,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 18:17:35,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -552220694, now seen corresponding path program 5 times [2022-03-01 18:17:35,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456776200] [2022-03-01 18:17:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,401 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 18:17:35,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456776200] [2022-03-01 18:17:35,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456776200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:35,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:35,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:17:35,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844321629] [2022-03-01 18:17:35,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:17:35,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:17:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:35,402 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,446 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2022-03-01 18:17:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,447 INFO L225 Difference]: With dead ends: 212 [2022-03-01 18:17:35,448 INFO L226 Difference]: Without dead ends: 204 [2022-03-01 18:17:35,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:35,448 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-01 18:17:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2022-03-01 18:17:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 18:17:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2022-03-01 18:17:35,455 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2022-03-01 18:17:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,455 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2022-03-01 18:17:35,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2022-03-01 18:17:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:17:35,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,456 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] [2022-03-01 18:17:35,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 18:17:35,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash -62492722, now seen corresponding path program 1 times [2022-03-01 18:17:35,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527044560] [2022-03-01 18:17:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:35,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:35,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527044560] [2022-03-01 18:17:35,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527044560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:35,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727388873] [2022-03-01 18:17:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:35,508 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 18:17:35,509 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 18:17:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-01 18:17:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:35,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:35,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727388873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:35,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:35,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 18:17:35,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205224312] [2022-03-01 18:17:35,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:35,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:35,647 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:35,711 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2022-03-01 18:17:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:17:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:35,713 INFO L225 Difference]: With dead ends: 251 [2022-03-01 18:17:35,713 INFO L226 Difference]: Without dead ends: 251 [2022-03-01 18:17:35,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:35,714 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:35,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-01 18:17:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2022-03-01 18:17:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 18:17:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2022-03-01 18:17:35,721 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2022-03-01 18:17:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2022-03-01 18:17:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2022-03-01 18:17:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:35,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:35,722 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 18:17:35,746 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 18:17:35,939 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,SelfDestructingSolverStorable9 [2022-03-01 18:17:35,940 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -851645140, now seen corresponding path program 1 times [2022-03-01 18:17:35,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:35,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938591514] [2022-03-01 18:17:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:36,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:36,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938591514] [2022-03-01 18:17:36,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938591514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:36,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45006210] [2022-03-01 18:17:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:36,065 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 18:17:36,067 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 18:17:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:36,420 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 22 treesize of output 18 [2022-03-01 18:17:36,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:17:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:36,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:36,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:36,532 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 20 [2022-03-01 18:17:36,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 18:17:36,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:36,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:17:36,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:17:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:36,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45006210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:36,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:36,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:17:36,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510225167] [2022-03-01 18:17:36,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:36,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:36,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:36,709 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:36,822 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2022-03-01 18:17:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:36,825 INFO L225 Difference]: With dead ends: 377 [2022-03-01 18:17:36,825 INFO L226 Difference]: Without dead ends: 362 [2022-03-01 18:17:36,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:36,826 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:36,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-01 18:17:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2022-03-01 18:17:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 18:17:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2022-03-01 18:17:36,834 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2022-03-01 18:17:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:36,834 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2022-03-01 18:17:36,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2022-03-01 18:17:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:36,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:36,837 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 18:17:36,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-01 18:17:37,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1414924140, now seen corresponding path program 2 times [2022-03-01 18:17:37,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:37,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895857518] [2022-03-01 18:17:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:37,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895857518] [2022-03-01 18:17:37,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895857518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:37,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585477125] [2022-03-01 18:17:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:37,168 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 18:17:37,212 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 18:17:37,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:37,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:37,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:17:37,406 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 18:17:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:37,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:37,517 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 15 treesize of output 20 [2022-03-01 18:17:37,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 18:17:37,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:37,568 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 12 treesize of output 17 [2022-03-01 18:17:37,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:17:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585477125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:37,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:37,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:17:37,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175379408] [2022-03-01 18:17:37,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:37,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:37,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:37,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:37,641 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:37,759 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2022-03-01 18:17:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:37,761 INFO L225 Difference]: With dead ends: 402 [2022-03-01 18:17:37,761 INFO L226 Difference]: Without dead ends: 387 [2022-03-01 18:17:37,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:37,762 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:37,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-01 18:17:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2022-03-01 18:17:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 18:17:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2022-03-01 18:17:37,769 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2022-03-01 18:17:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:37,769 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2022-03-01 18:17:37,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2022-03-01 18:17:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:37,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:37,771 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 18:17:37,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-01 18:17:37,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,979 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1944109140, now seen corresponding path program 3 times [2022-03-01 18:17:37,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:37,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636430869] [2022-03-01 18:17:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:38,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:38,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636430869] [2022-03-01 18:17:38,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636430869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:38,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364522228] [2022-03-01 18:17:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:38,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:38,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:38,065 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 18:17:38,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:17:38,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:38,097 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 18:17:38,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:38,327 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 20 treesize of output 14 [2022-03-01 18:17:38,330 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 20 treesize of output 14 [2022-03-01 18:17:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:38,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:38,425 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 20 [2022-03-01 18:17:38,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 18:17:38,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:38,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:17:38,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:17:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:38,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364522228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:38,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:38,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:17:38,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299792074] [2022-03-01 18:17:38,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:38,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:38,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:38,538 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:38,656 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2022-03-01 18:17:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:38,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:38,659 INFO L225 Difference]: With dead ends: 461 [2022-03-01 18:17:38,659 INFO L226 Difference]: Without dead ends: 446 [2022-03-01 18:17:38,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:38,659 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:38,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-03-01 18:17:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2022-03-01 18:17:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 18:17:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-03-01 18:17:38,666 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2022-03-01 18:17:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:38,666 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-03-01 18:17:38,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-03-01 18:17:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:38,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:38,667 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 18:17:38,684 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 18:17:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:17:38,884 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1813144784, now seen corresponding path program 4 times [2022-03-01 18:17:38,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:38,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123944199] [2022-03-01 18:17:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:39,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123944199] [2022-03-01 18:17:39,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123944199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:39,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976765613] [2022-03-01 18:17:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:39,023 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 18:17:39,024 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 18:17:39,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:39,223 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 25 treesize of output 19 [2022-03-01 18:17:39,234 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 20 treesize of output 14 [2022-03-01 18:17:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:39,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:39,330 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 16 treesize of output 21 [2022-03-01 18:17:39,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 18:17:39,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:39,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:17:39,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2022-03-01 18:17:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976765613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:39,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:39,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:17:39,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791568120] [2022-03-01 18:17:39,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:39,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:39,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:39,453 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:39,541 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-03-01 18:17:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:39,543 INFO L225 Difference]: With dead ends: 435 [2022-03-01 18:17:39,543 INFO L226 Difference]: Without dead ends: 420 [2022-03-01 18:17:39,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:39,544 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:39,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-01 18:17:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2022-03-01 18:17:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 18:17:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2022-03-01 18:17:39,550 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2022-03-01 18:17:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2022-03-01 18:17:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2022-03-01 18:17:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:39,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:39,552 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 18:17:39,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:39,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:39,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1947787600, now seen corresponding path program 5 times [2022-03-01 18:17:39,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:39,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325519426] [2022-03-01 18:17:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:39,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325519426] [2022-03-01 18:17:39,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325519426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:39,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088981215] [2022-03-01 18:17:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:39,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:39,854 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 18:17:39,879 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 18:17:39,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:40,043 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 18:17:40,090 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 18:17:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:40,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:40,241 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 18 treesize of output 23 [2022-03-01 18:17:40,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:40,246 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 14 treesize of output 19 [2022-03-01 18:17:40,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-01 18:17:40,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:17:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088981215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:40,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:40,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:17:40,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259285286] [2022-03-01 18:17:40,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:17:40,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:17:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:40,338 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:40,426 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2022-03-01 18:17:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:40,428 INFO L225 Difference]: With dead ends: 471 [2022-03-01 18:17:40,428 INFO L226 Difference]: Without dead ends: 456 [2022-03-01 18:17:40,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:40,430 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:40,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-01 18:17:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2022-03-01 18:17:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 18:17:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-03-01 18:17:40,437 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-03-01 18:17:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:40,437 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-03-01 18:17:40,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-03-01 18:17:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:40,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:40,438 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 18:17:40,454 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 18:17:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:40,651 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1359688084, now seen corresponding path program 6 times [2022-03-01 18:17:40,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:40,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905916209] [2022-03-01 18:17:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:40,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905916209] [2022-03-01 18:17:40,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905916209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:40,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120219390] [2022-03-01 18:17:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:40,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:40,729 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 18:17:40,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:17:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:40,765 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 18:17:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:17:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:40,918 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 18:17:40,931 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 20 treesize of output 14 [2022-03-01 18:17:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:41,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:41,035 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 24 [2022-03-01 18:17:41,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:41,040 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 20 [2022-03-01 18:17:41,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-01 18:17:41,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:17:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:41,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120219390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:41,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:41,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:17:41,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519588990] [2022-03-01 18:17:41,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:17:41,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:17:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:41,160 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:41,250 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2022-03-01 18:17:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:41,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:41,253 INFO L225 Difference]: With dead ends: 463 [2022-03-01 18:17:41,253 INFO L226 Difference]: Without dead ends: 448 [2022-03-01 18:17:41,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:41,253 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:41,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-01 18:17:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2022-03-01 18:17:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 18:17:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-03-01 18:17:41,260 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-03-01 18:17:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:41,260 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-03-01 18:17:41,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-03-01 18:17:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:41,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:41,261 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] [2022-03-01 18:17:41,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-01 18:17:41,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:17:41,477 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1997398602, now seen corresponding path program 7 times [2022-03-01 18:17:41,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:41,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644012499] [2022-03-01 18:17:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:41,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:41,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:41,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644012499] [2022-03-01 18:17:41,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644012499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:41,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067346264] [2022-03-01 18:17:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:41,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:41,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:41,509 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 18:17:41,510 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 18:17:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:41,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:41,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:41,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067346264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:41,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:41,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:17:41,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389323109] [2022-03-01 18:17:41,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:41,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:17:41,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:17:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:41,618 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:41,716 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2022-03-01 18:17:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:41,720 INFO L225 Difference]: With dead ends: 800 [2022-03-01 18:17:41,720 INFO L226 Difference]: Without dead ends: 800 [2022-03-01 18:17:41,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:17:41,720 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:41,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-03-01 18:17:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2022-03-01 18:17:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states 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 18:17:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2022-03-01 18:17:41,730 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2022-03-01 18:17:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:41,730 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2022-03-01 18:17:41,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2022-03-01 18:17:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:41,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:41,731 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] [2022-03-01 18:17:41,749 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 18:17:41,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 18:17:41,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1419061262, now seen corresponding path program 8 times [2022-03-01 18:17:41,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:41,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106941489] [2022-03-01 18:17:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:41,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:41,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106941489] [2022-03-01 18:17:41,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106941489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:41,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316949033] [2022-03-01 18:17:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:41,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:41,970 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 18:17:41,996 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 18:17:41,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:17:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:42,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:42,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316949033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:42,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:42,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:17:42,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092612533] [2022-03-01 18:17:42,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:17:42,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:17:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:42,110 INFO L87 Difference]: Start difference. First operand 428 states and 1322 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 18:17:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:42,495 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2022-03-01 18:17:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:17:42,495 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 24 [2022-03-01 18:17:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:42,502 INFO L225 Difference]: With dead ends: 1302 [2022-03-01 18:17:42,502 INFO L226 Difference]: Without dead ends: 1252 [2022-03-01 18:17:42,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:17:42,503 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 260 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 71 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-03-01 18:17:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2022-03-01 18:17:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states 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 18:17:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2022-03-01 18:17:42,532 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2022-03-01 18:17:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2022-03-01 18:17:42,533 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 18:17:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2022-03-01 18:17:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:42,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:42,535 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] [2022-03-01 18:17:42,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:42,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:17:42,776 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash 982092554, now seen corresponding path program 9 times [2022-03-01 18:17:42,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:42,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332315119] [2022-03-01 18:17:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:42,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:42,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332315119] [2022-03-01 18:17:42,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332315119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:42,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042435464] [2022-03-01 18:17:42,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:42,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:42,828 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 18:17:42,892 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 18:17:42,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:17:42,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:42,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:43,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042435464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:43,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:43,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 18:17:43,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739509287] [2022-03-01 18:17:43,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:43,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:17:43,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:17:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:43,016 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:43,126 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2022-03-01 18:17:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:43,134 INFO L225 Difference]: With dead ends: 1440 [2022-03-01 18:17:43,134 INFO L226 Difference]: Without dead ends: 1297 [2022-03-01 18:17:43,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:43,135 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:43,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 51 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-03-01 18:17:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2022-03-01 18:17:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states 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 18:17:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2022-03-01 18:17:43,165 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2022-03-01 18:17:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2022-03-01 18:17:43,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2022-03-01 18:17:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:43,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:43,170 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] [2022-03-01 18:17:43,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:43,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:43,375 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1416074220, now seen corresponding path program 10 times [2022-03-01 18:17:43,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:43,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913431872] [2022-03-01 18:17:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:43,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:43,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913431872] [2022-03-01 18:17:43,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913431872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:43,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235725627] [2022-03-01 18:17:43,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:43,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:43,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:43,401 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 18:17:43,402 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 18:17:43,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:43,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235725627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:43,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:43,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:43,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628492048] [2022-03-01 18:17:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:43,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:43,505 INFO L87 Difference]: Start difference. First operand 986 states and 3247 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:43,574 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2022-03-01 18:17:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:17:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:43,580 INFO L225 Difference]: With dead ends: 1349 [2022-03-01 18:17:43,580 INFO L226 Difference]: Without dead ends: 1343 [2022-03-01 18:17:43,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:43,580 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-03-01 18:17:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2022-03-01 18:17:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states 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 18:17:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2022-03-01 18:17:43,602 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2022-03-01 18:17:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:43,603 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2022-03-01 18:17:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2022-03-01 18:17:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:43,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:43,605 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] [2022-03-01 18:17:43,622 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 18:17:43,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:43,822 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -243104664, now seen corresponding path program 11 times [2022-03-01 18:17:43,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:43,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554923839] [2022-03-01 18:17:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:43,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:43,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554923839] [2022-03-01 18:17:43,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554923839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:43,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290141975] [2022-03-01 18:17:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:43,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:43,856 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 18:17:43,875 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 18:17:43,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:17:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:17:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:43,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:43,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290141975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:43,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:43,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 18:17:43,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994900676] [2022-03-01 18:17:43,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:43,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:17:43,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:17:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:43,980 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:44,069 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2022-03-01 18:17:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:44,076 INFO L225 Difference]: With dead ends: 2033 [2022-03-01 18:17:44,077 INFO L226 Difference]: Without dead ends: 2018 [2022-03-01 18:17:44,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:44,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:44,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 42 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-03-01 18:17:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2022-03-01 18:17:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states 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 18:17:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2022-03-01 18:17:44,110 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2022-03-01 18:17:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:44,110 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2022-03-01 18:17:44,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2022-03-01 18:17:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:44,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:44,114 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] [2022-03-01 18:17:44,131 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 18:17:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-01 18:17:44,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1639204200, now seen corresponding path program 12 times [2022-03-01 18:17:44,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:44,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323652746] [2022-03-01 18:17:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:44,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323652746] [2022-03-01 18:17:44,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323652746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:44,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544161399] [2022-03-01 18:17:44,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:44,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:44,364 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 18:17:44,365 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 18:17:44,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:17:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544161399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:44,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:44,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:44,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109595318] [2022-03-01 18:17:44,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:44,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:44,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:44,485 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:44,564 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2022-03-01 18:17:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:44,571 INFO L225 Difference]: With dead ends: 1938 [2022-03-01 18:17:44,571 INFO L226 Difference]: Without dead ends: 1922 [2022-03-01 18:17:44,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:44,573 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:44,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 48 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-03-01 18:17:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2022-03-01 18:17:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states 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 18:17:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2022-03-01 18:17:44,601 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2022-03-01 18:17:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2022-03-01 18:17:44,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2022-03-01 18:17:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:44,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:44,604 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] [2022-03-01 18:17:44,621 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 18:17:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:44,820 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1856306738, now seen corresponding path program 13 times [2022-03-01 18:17:44,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:44,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464764883] [2022-03-01 18:17:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:44,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464764883] [2022-03-01 18:17:44,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464764883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:44,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993658914] [2022-03-01 18:17:44,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:44,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:44,845 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 18:17:44,846 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 18:17:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:44,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:44,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993658914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:44,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:44,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:44,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727891597] [2022-03-01 18:17:44,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:44,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:44,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:44,944 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:45,023 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2022-03-01 18:17:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:17:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:45,041 INFO L225 Difference]: With dead ends: 2961 [2022-03-01 18:17:45,041 INFO L226 Difference]: Without dead ends: 2952 [2022-03-01 18:17:45,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:45,043 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:45,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-03-01 18:17:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2022-03-01 18:17:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 18:17:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2022-03-01 18:17:45,092 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2022-03-01 18:17:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:45,092 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2022-03-01 18:17:45,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2022-03-01 18:17:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:45,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:45,096 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] [2022-03-01 18:17:45,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:45,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:45,312 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash -266436362, now seen corresponding path program 14 times [2022-03-01 18:17:45,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:45,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974664275] [2022-03-01 18:17:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:45,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:45,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974664275] [2022-03-01 18:17:45,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974664275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:45,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679254845] [2022-03-01 18:17:45,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:45,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:45,352 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 18:17:45,353 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 18:17:45,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679254845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:45,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:45,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:45,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106748371] [2022-03-01 18:17:45,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:45,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:45,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:45,452 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:45,539 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2022-03-01 18:17:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:45,550 INFO L225 Difference]: With dead ends: 3041 [2022-03-01 18:17:45,550 INFO L226 Difference]: Without dead ends: 3041 [2022-03-01 18:17:45,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:45,551 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:45,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 61 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-01 18:17:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2022-03-01 18:17:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states 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 18:17:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2022-03-01 18:17:45,597 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2022-03-01 18:17:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:45,597 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2022-03-01 18:17:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2022-03-01 18:17:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:45,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:45,601 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] [2022-03-01 18:17:45,620 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 18:17:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 18:17:45,818 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash -993594422, now seen corresponding path program 15 times [2022-03-01 18:17:45,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:45,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549281142] [2022-03-01 18:17:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:45,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:45,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:45,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549281142] [2022-03-01 18:17:45,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549281142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:45,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955957848] [2022-03-01 18:17:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:45,842 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 18:17:45,844 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 18:17:45,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:17:45,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955957848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:45,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:45,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:17:45,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564416048] [2022-03-01 18:17:45,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:45,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:17:45,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:45,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:17:45,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:45,995 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 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 18:17:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:46,505 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2022-03-01 18:17:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:17:46,505 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 24 [2022-03-01 18:17:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:46,529 INFO L225 Difference]: With dead ends: 9230 [2022-03-01 18:17:46,530 INFO L226 Difference]: Without dead ends: 8962 [2022-03-01 18:17:46,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:17:46,531 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:46,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 157 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2022-03-01 18:17:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2022-03-01 18:17:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states 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 18:17:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2022-03-01 18:17:46,693 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2022-03-01 18:17:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:46,693 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2022-03-01 18:17:46,693 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 18:17:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2022-03-01 18:17:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:46,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:46,702 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] [2022-03-01 18:17:46,721 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 18:17:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:46,915 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2078630128, now seen corresponding path program 16 times [2022-03-01 18:17:46,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:46,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783902203] [2022-03-01 18:17:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:46,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:46,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783902203] [2022-03-01 18:17:46,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783902203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:46,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692542930] [2022-03-01 18:17:46,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:46,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:46,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:46,939 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 18:17:46,956 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 18:17:46,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:47,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:47,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692542930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:47,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:47,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:47,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948629590] [2022-03-01 18:17:47,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:47,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:47,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:47,066 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:47,212 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2022-03-01 18:17:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:17:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:47,228 INFO L225 Difference]: With dead ends: 5640 [2022-03-01 18:17:47,228 INFO L226 Difference]: Without dead ends: 5614 [2022-03-01 18:17:47,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:47,228 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:47,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2022-03-01 18:17:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2022-03-01 18:17:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states 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 18:17:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2022-03-01 18:17:47,323 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2022-03-01 18:17:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:47,323 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2022-03-01 18:17:47,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2022-03-01 18:17:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:47,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:47,331 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] [2022-03-01 18:17:47,349 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 18:17:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:47,548 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 319339466, now seen corresponding path program 17 times [2022-03-01 18:17:47,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:47,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114816670] [2022-03-01 18:17:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:47,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:47,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114816670] [2022-03-01 18:17:47,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114816670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:47,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131433133] [2022-03-01 18:17:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:47,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:47,578 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 18:17:47,580 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 18:17:47,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:17:47,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:47,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:47,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131433133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:47,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:47,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-01 18:17:47,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409416906] [2022-03-01 18:17:47,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:47,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 18:17:47,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 18:17:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:47,688 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:47,868 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2022-03-01 18:17:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:17:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:47,883 INFO L225 Difference]: With dead ends: 6419 [2022-03-01 18:17:47,883 INFO L226 Difference]: Without dead ends: 6345 [2022-03-01 18:17:47,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:17:47,883 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:47,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 47 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2022-03-01 18:17:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2022-03-01 18:17:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 states 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 18:17:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2022-03-01 18:17:48,053 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2022-03-01 18:17:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:48,054 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2022-03-01 18:17:48,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2022-03-01 18:17:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:48,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:48,063 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] [2022-03-01 18:17:48,101 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 18:17:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:48,276 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1402063808, now seen corresponding path program 18 times [2022-03-01 18:17:48,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:48,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078765377] [2022-03-01 18:17:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:48,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:48,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078765377] [2022-03-01 18:17:48,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078765377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:48,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986116595] [2022-03-01 18:17:48,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:48,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:48,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:48,309 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 18:17:48,320 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 18:17:48,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:17:48,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:48,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:48,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986116595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:48,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:48,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:48,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816257667] [2022-03-01 18:17:48,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:48,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:48,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:48,424 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:48,542 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2022-03-01 18:17:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:17:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:48,558 INFO L225 Difference]: With dead ends: 5931 [2022-03-01 18:17:48,559 INFO L226 Difference]: Without dead ends: 5906 [2022-03-01 18:17:48,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:48,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:48,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2022-03-01 18:17:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2022-03-01 18:17:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 states 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 18:17:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2022-03-01 18:17:48,662 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2022-03-01 18:17:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:48,662 INFO L470 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2022-03-01 18:17:48,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2022-03-01 18:17:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:48,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:48,672 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] [2022-03-01 18:17:48,689 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 18:17:48,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:17:48,887 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -199751440, now seen corresponding path program 19 times [2022-03-01 18:17:48,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:48,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705184490] [2022-03-01 18:17:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:48,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:48,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705184490] [2022-03-01 18:17:48,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705184490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:48,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714086437] [2022-03-01 18:17:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:48,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:48,919 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 18:17:48,919 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 18:17:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:48,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:49,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714086437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:49,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:49,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 18:17:49,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896834874] [2022-03-01 18:17:49,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:49,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:49,043 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:49,168 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2022-03-01 18:17:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:49,188 INFO L225 Difference]: With dead ends: 6187 [2022-03-01 18:17:49,188 INFO L226 Difference]: Without dead ends: 6177 [2022-03-01 18:17:49,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:49,189 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:49,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 51 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-03-01 18:17:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2022-03-01 18:17:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 states 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 18:17:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2022-03-01 18:17:49,378 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2022-03-01 18:17:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2022-03-01 18:17:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2022-03-01 18:17:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:49,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:49,393 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] [2022-03-01 18:17:49,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-01 18:17:49,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:17:49,615 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1472685148, now seen corresponding path program 20 times [2022-03-01 18:17:49,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:49,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695616336] [2022-03-01 18:17:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:49,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:49,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695616336] [2022-03-01 18:17:49,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695616336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:49,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961183955] [2022-03-01 18:17:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:49,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:49,650 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 18:17:49,651 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 18:17:49,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:17:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:49,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961183955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:49,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:49,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:17:49,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421868935] [2022-03-01 18:17:49,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:49,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:49,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:49,780 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:50,251 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2022-03-01 18:17:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:17:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:50,267 INFO L225 Difference]: With dead ends: 7179 [2022-03-01 18:17:50,267 INFO L226 Difference]: Without dead ends: 7111 [2022-03-01 18:17:50,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:17:50,268 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:50,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 107 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2022-03-01 18:17:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2022-03-01 18:17:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 states 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 18:17:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2022-03-01 18:17:50,371 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2022-03-01 18:17:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:50,371 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2022-03-01 18:17:50,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2022-03-01 18:17:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:50,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:50,435 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] [2022-03-01 18:17:50,471 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 18:17:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:50,636 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 828713550, now seen corresponding path program 21 times [2022-03-01 18:17:50,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:50,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203234187] [2022-03-01 18:17:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:50,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:50,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203234187] [2022-03-01 18:17:50,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203234187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:50,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68756699] [2022-03-01 18:17:50,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:50,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:50,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:50,661 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 18:17:50,662 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 18:17:50,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:17:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:17:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:50,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:50,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68756699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:50,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:50,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-01 18:17:50,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648118905] [2022-03-01 18:17:50,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:50,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:50,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:50,779 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 18:17:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:51,174 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2022-03-01 18:17:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:17:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 24 [2022-03-01 18:17:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:51,203 INFO L225 Difference]: With dead ends: 11751 [2022-03-01 18:17:51,203 INFO L226 Difference]: Without dead ends: 11587 [2022-03-01 18:17:51,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:17:51,204 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:51,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 87 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2022-03-01 18:17:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2022-03-01 18:17:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 states 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 18:17:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2022-03-01 18:17:51,388 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2022-03-01 18:17:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:51,388 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2022-03-01 18:17:51,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 18:17:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2022-03-01 18:17:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:51,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:51,440 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] [2022-03-01 18:17:51,457 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 18:17:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:51,657 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1031366276, now seen corresponding path program 22 times [2022-03-01 18:17:51,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:51,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310311591] [2022-03-01 18:17:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:51,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:51,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310311591] [2022-03-01 18:17:51,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310311591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:51,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603835663] [2022-03-01 18:17:51,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:51,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:51,693 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 18:17:51,694 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 18:17:51,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:51,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:51,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:17:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:51,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:51,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603835663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:51,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:51,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 18:17:51,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179991260] [2022-03-01 18:17:51,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:51,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:51,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:51,808 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:51,961 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2022-03-01 18:17:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:17:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:51,983 INFO L225 Difference]: With dead ends: 9470 [2022-03-01 18:17:51,983 INFO L226 Difference]: Without dead ends: 9392 [2022-03-01 18:17:51,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:17:51,984 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:51,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 66 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2022-03-01 18:17:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2022-03-01 18:17:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 states 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 18:17:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2022-03-01 18:17:52,142 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2022-03-01 18:17:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:52,142 INFO L470 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2022-03-01 18:17:52,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2022-03-01 18:17:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:52,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:52,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:52,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 18:17:52,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:52,375 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash 213109642, now seen corresponding path program 23 times [2022-03-01 18:17:52,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:52,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393135391] [2022-03-01 18:17:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:52,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:52,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393135391] [2022-03-01 18:17:52,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393135391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:52,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210736043] [2022-03-01 18:17:52,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:52,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:52,700 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 18:17:52,701 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 18:17:52,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:17:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:17:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:53,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:17:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:53,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,204 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 46 treesize of output 34 [2022-03-01 18:17:53,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:17:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:53,355 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:17:53,355 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 30 treesize of output 55 [2022-03-01 18:17:53,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:53,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:17:53,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,542 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:17:53,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:17:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:53,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:17:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210736043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:53,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:53,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:17:53,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131180525] [2022-03-01 18:17:53,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:53,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:17:53,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:17:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:17:53,663 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:17:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:54,172 INFO L93 Difference]: Finished difference Result 11612 states and 42094 transitions. [2022-03-01 18:17:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:17:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 28 [2022-03-01 18:17:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:54,204 INFO L225 Difference]: With dead ends: 11612 [2022-03-01 18:17:54,204 INFO L226 Difference]: Without dead ends: 11609 [2022-03-01 18:17:54,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:54,205 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:54,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 254 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 475 Invalid, 0 Unknown, 326 Unchecked, 0.3s Time] [2022-03-01 18:17:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11609 states. [2022-03-01 18:17:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11609 to 8581. [2022-03-01 18:17:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.7157342657342656) internal successors, (31881), 8580 states have internal predecessors, (31881), 0 states have call successors, (0), 0 states 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 18:17:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 31881 transitions. [2022-03-01 18:17:54,462 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 31881 transitions. Word has length 28 [2022-03-01 18:17:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:54,462 INFO L470 AbstractCegarLoop]: Abstraction has 8581 states and 31881 transitions. [2022-03-01 18:17:54,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:17:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 31881 transitions. [2022-03-01 18:17:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:54,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:54,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:54,496 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 18:17:54,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-01 18:17:54,695 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1560240398, now seen corresponding path program 24 times [2022-03-01 18:17:54,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:54,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784943208] [2022-03-01 18:17:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:54,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:54,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:54,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784943208] [2022-03-01 18:17:54,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784943208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:54,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038898870] [2022-03-01 18:17:54,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:54,921 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 18:17:54,922 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 18:17:54,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:17:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:17:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:55,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:17:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:55,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,421 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 46 treesize of output 34 [2022-03-01 18:17:55,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:17:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:55,584 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:17:55,584 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 30 treesize of output 55 [2022-03-01 18:17:55,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:55,644 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 30 treesize of output 14 [2022-03-01 18:17:55,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,744 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:17:55,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:17:55,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:55,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:17:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038898870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:55,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:55,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:17:55,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570376479] [2022-03-01 18:17:55,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:55,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:17:55,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:17:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:17:55,873 INFO L87 Difference]: Start difference. First operand 8581 states and 31881 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:17:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,497 INFO L93 Difference]: Finished difference Result 11632 states and 42147 transitions. [2022-03-01 18:17:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:17:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:17:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,523 INFO L225 Difference]: With dead ends: 11632 [2022-03-01 18:17:56,523 INFO L226 Difference]: Without dead ends: 11629 [2022-03-01 18:17:56,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:17:56,524 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 275 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 512 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2022-03-01 18:17:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2022-03-01 18:17:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 8593. [2022-03-01 18:17:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8593 states, 8592 states have (on average 3.7138035381750467) internal successors, (31909), 8592 states have internal predecessors, (31909), 0 states have call successors, (0), 0 states 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 18:17:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 31909 transitions. [2022-03-01 18:17:56,681 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 31909 transitions. Word has length 28 [2022-03-01 18:17:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,681 INFO L470 AbstractCegarLoop]: Abstraction has 8593 states and 31909 transitions. [2022-03-01 18:17:56,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:17:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 31909 transitions. [2022-03-01 18:17:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:56,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,712 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 18:17:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-01 18:17:56,911 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1601865618, now seen corresponding path program 25 times [2022-03-01 18:17:56,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293373871] [2022-03-01 18:17:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:57,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293373871] [2022-03-01 18:17:57,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293373871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:57,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992058221] [2022-03-01 18:17:57,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:57,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:57,155 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 18:17:57,156 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 18:17:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:17:57,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:57,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:17:57,601 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 24 treesize of output 20 [2022-03-01 18:17:57,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:57,606 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-01 18:17:57,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:17:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:57,751 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:17:57,751 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 30 treesize of output 55 [2022-03-01 18:17:57,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:57,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:57,806 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 30 treesize of output 14 [2022-03-01 18:17:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:57,944 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:17:57,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:17:58,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:58,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:58,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:17:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992058221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:58,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:58,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:17:58,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785861100] [2022-03-01 18:17:58,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:17:58,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:17:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:17:58,075 INFO L87 Difference]: Start difference. First operand 8593 states and 31909 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:17:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:58,718 INFO L93 Difference]: Finished difference Result 11665 states and 42260 transitions. [2022-03-01 18:17:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:17:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:17:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:58,746 INFO L225 Difference]: With dead ends: 11665 [2022-03-01 18:17:58,747 INFO L226 Difference]: Without dead ends: 11650 [2022-03-01 18:17:58,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:17:58,748 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:58,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 303 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 715 Invalid, 0 Unknown, 465 Unchecked, 0.3s Time] [2022-03-01 18:17:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11650 states. [2022-03-01 18:17:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11650 to 8655. [2022-03-01 18:17:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8655 states, 8654 states have (on average 3.7110006933210076) internal successors, (32115), 8654 states have internal predecessors, (32115), 0 states have call successors, (0), 0 states 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 18:17:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 32115 transitions. [2022-03-01 18:17:58,926 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 32115 transitions. Word has length 28 [2022-03-01 18:17:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:58,927 INFO L470 AbstractCegarLoop]: Abstraction has 8655 states and 32115 transitions. [2022-03-01 18:17:58,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:17:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 32115 transitions. [2022-03-01 18:17:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:58,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:58,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:58,977 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 18:17:59,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 18:17:59,159 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:59,159 INFO L85 PathProgramCache]: Analyzing trace with hash 837768650, now seen corresponding path program 26 times [2022-03-01 18:17:59,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:59,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086774684] [2022-03-01 18:17:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:59,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086774684] [2022-03-01 18:17:59,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086774684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:59,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193358454] [2022-03-01 18:17:59,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:59,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:59,409 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 18:17:59,410 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 18:17:59,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:59,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:59,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:17:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:59,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:17:59,821 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 24 treesize of output 20 [2022-03-01 18:17:59,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 18:17:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:59,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:59,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:17:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:59,968 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:17:59,968 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 30 treesize of output 55 [2022-03-01 18:18:00,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:00,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:18:00,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,118 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:00,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:00,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:00,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:00,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193358454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:00,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:00,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:00,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685891231] [2022-03-01 18:18:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:00,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:00,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:00,244 INFO L87 Difference]: Start difference. First operand 8655 states and 32115 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:00,745 INFO L93 Difference]: Finished difference Result 11796 states and 42646 transitions. [2022-03-01 18:18:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:18:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:00,778 INFO L225 Difference]: With dead ends: 11796 [2022-03-01 18:18:00,778 INFO L226 Difference]: Without dead ends: 11740 [2022-03-01 18:18:00,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:18:00,779 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:00,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 249 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-03-01 18:18:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11740 states. [2022-03-01 18:18:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11740 to 8708. [2022-03-01 18:18:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8708 states, 8707 states have (on average 3.7060985414034686) internal successors, (32269), 8707 states have internal predecessors, (32269), 0 states have call successors, (0), 0 states 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 18:18:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8708 states to 8708 states and 32269 transitions. [2022-03-01 18:18:00,946 INFO L78 Accepts]: Start accepts. Automaton has 8708 states and 32269 transitions. Word has length 28 [2022-03-01 18:18:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:00,946 INFO L470 AbstractCegarLoop]: Abstraction has 8708 states and 32269 transitions. [2022-03-01 18:18:00,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8708 states and 32269 transitions. [2022-03-01 18:18:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:00,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:00,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:00,979 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 18:18:01,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:01,171 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1190629366, now seen corresponding path program 27 times [2022-03-01 18:18:01,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:01,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161738624] [2022-03-01 18:18:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:01,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:01,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161738624] [2022-03-01 18:18:01,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161738624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:01,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061486180] [2022-03-01 18:18:01,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:01,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:01,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:01,398 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 18:18:01,399 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 18:18:01,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:18:01,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:01,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:18:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:01,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:01,935 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 24 treesize of output 20 [2022-03-01 18:18:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:01,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:01,947 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 34 treesize of output 38 [2022-03-01 18:18:02,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:02,116 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 72 treesize of output 72 [2022-03-01 18:18:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:02,691 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:18:02,691 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 54 treesize of output 79 [2022-03-01 18:18:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:03,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:03,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:03,252 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 60 treesize of output 55 [2022-03-01 18:18:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:03,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061486180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:03,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:03,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:18:03,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697192456] [2022-03-01 18:18:03,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:03,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:18:03,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:18:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:18:03,392 INFO L87 Difference]: Start difference. First operand 8708 states and 32269 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:05,005 INFO L93 Difference]: Finished difference Result 18757 states and 66076 transitions. [2022-03-01 18:18:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:18:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:18:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:05,048 INFO L225 Difference]: With dead ends: 18757 [2022-03-01 18:18:05,048 INFO L226 Difference]: Without dead ends: 18743 [2022-03-01 18:18:05,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:18:05,049 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:05,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 431 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 596 Invalid, 0 Unknown, 707 Unchecked, 0.3s Time] [2022-03-01 18:18:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18743 states. [2022-03-01 18:18:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18743 to 8752. [2022-03-01 18:18:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 3.701405553651011) internal successors, (32391), 8751 states have internal predecessors, (32391), 0 states have call successors, (0), 0 states 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 18:18:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 32391 transitions. [2022-03-01 18:18:05,257 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 32391 transitions. Word has length 28 [2022-03-01 18:18:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:05,258 INFO L470 AbstractCegarLoop]: Abstraction has 8752 states and 32391 transitions. [2022-03-01 18:18:05,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 32391 transitions. [2022-03-01 18:18:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:05,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:05,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:05,289 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 18:18:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:18:05,489 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash 631830218, now seen corresponding path program 28 times [2022-03-01 18:18:05,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:05,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136058737] [2022-03-01 18:18:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:05,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:05,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136058737] [2022-03-01 18:18:05,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136058737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:05,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595593204] [2022-03-01 18:18:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:05,693 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 18:18:05,738 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 18:18:05,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:05,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:06,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,198 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 49 treesize of output 37 [2022-03-01 18:18:06,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:18:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:06,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:06,336 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:06,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-03-01 18:18:06,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:06,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:18:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,504 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:06,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:06,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:06,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:06,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595593204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:06,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:06,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:06,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090769754] [2022-03-01 18:18:06,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:06,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:06,614 INFO L87 Difference]: Start difference. First operand 8752 states and 32391 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:07,040 INFO L93 Difference]: Finished difference Result 11726 states and 42445 transitions. [2022-03-01 18:18:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:18:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:18:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:07,067 INFO L225 Difference]: With dead ends: 11726 [2022-03-01 18:18:07,067 INFO L226 Difference]: Without dead ends: 11711 [2022-03-01 18:18:07,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:18:07,067 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:07,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 194 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 352 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-03-01 18:18:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11711 states. [2022-03-01 18:18:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11711 to 8792. [2022-03-01 18:18:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8792 states, 8791 states have (on average 3.7001478785121145) internal successors, (32528), 8791 states have internal predecessors, (32528), 0 states have call successors, (0), 0 states 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 18:18:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8792 states to 8792 states and 32528 transitions. [2022-03-01 18:18:07,227 INFO L78 Accepts]: Start accepts. Automaton has 8792 states and 32528 transitions. Word has length 28 [2022-03-01 18:18:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:07,227 INFO L470 AbstractCegarLoop]: Abstraction has 8792 states and 32528 transitions. [2022-03-01 18:18:07,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8792 states and 32528 transitions. [2022-03-01 18:18:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:07,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:07,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:07,258 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 18:18:07,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:18:07,444 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2104926016, now seen corresponding path program 29 times [2022-03-01 18:18:07,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:07,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251044511] [2022-03-01 18:18:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:07,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:07,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:07,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251044511] [2022-03-01 18:18:07,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251044511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:07,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459895343] [2022-03-01 18:18:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:07,674 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 18:18:07,675 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 18:18:07,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:07,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:07,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:08,139 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 24 treesize of output 20 [2022-03-01 18:18:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:08,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,143 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 39 treesize of output 27 [2022-03-01 18:18:08,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:08,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:08,281 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:08,281 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 30 treesize of output 55 [2022-03-01 18:18:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:08,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:18:08,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,444 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:08,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:08,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:08,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459895343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:08,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:08,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:08,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807892214] [2022-03-01 18:18:08,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:08,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:08,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:08,566 INFO L87 Difference]: Start difference. First operand 8792 states and 32528 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:18:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:08,984 INFO L93 Difference]: Finished difference Result 11857 states and 42825 transitions. [2022-03-01 18:18:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:18:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:18:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:09,011 INFO L225 Difference]: With dead ends: 11857 [2022-03-01 18:18:09,011 INFO L226 Difference]: Without dead ends: 11842 [2022-03-01 18:18:09,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:18:09,012 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:09,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 214 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 512 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-03-01 18:18:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11842 states. [2022-03-01 18:18:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11842 to 8817. [2022-03-01 18:18:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 8816 states have (on average 3.698162431941924) internal successors, (32603), 8816 states have internal predecessors, (32603), 0 states have call successors, (0), 0 states 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 18:18:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 32603 transitions. [2022-03-01 18:18:09,293 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 32603 transitions. Word has length 28 [2022-03-01 18:18:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:09,293 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 32603 transitions. [2022-03-01 18:18:09,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:18:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 32603 transitions. [2022-03-01 18:18:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:09,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:09,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:09,334 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 18:18:09,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:18:09,527 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1396567798, now seen corresponding path program 30 times [2022-03-01 18:18:09,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:09,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153923673] [2022-03-01 18:18:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:09,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:09,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:09,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153923673] [2022-03-01 18:18:09,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153923673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:09,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22349237] [2022-03-01 18:18:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:09,852 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 18:18:09,853 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 18:18:09,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:18:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:10,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:10,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,265 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 42 treesize of output 30 [2022-03-01 18:18:10,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:10,477 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:10,477 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 30 treesize of output 55 [2022-03-01 18:18:10,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:10,555 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 31 treesize of output 15 [2022-03-01 18:18:10,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,676 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:10,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:10,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:10,748 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 23 treesize of output 6 [2022-03-01 18:18:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:10,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22349237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:10,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:10,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:10,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042004258] [2022-03-01 18:18:10,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:10,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:10,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:10,806 INFO L87 Difference]: Start difference. First operand 8817 states and 32603 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:11,376 INFO L93 Difference]: Finished difference Result 11883 states and 42937 transitions. [2022-03-01 18:18:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:18:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:11,405 INFO L225 Difference]: With dead ends: 11883 [2022-03-01 18:18:11,406 INFO L226 Difference]: Without dead ends: 11844 [2022-03-01 18:18:11,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:18:11,406 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 107 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:11,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 254 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 672 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-03-01 18:18:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-03-01 18:18:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 8822. [2022-03-01 18:18:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.698900351434078) internal successors, (32628), 8821 states have internal predecessors, (32628), 0 states have call successors, (0), 0 states 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 18:18:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 32628 transitions. [2022-03-01 18:18:11,580 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 32628 transitions. Word has length 28 [2022-03-01 18:18:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:11,580 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 32628 transitions. [2022-03-01 18:18:11,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 32628 transitions. [2022-03-01 18:18:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:11,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:11,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:11,612 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 18:18:11,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:18:11,812 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 459271548, now seen corresponding path program 31 times [2022-03-01 18:18:11,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:11,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163862734] [2022-03-01 18:18:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:12,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163862734] [2022-03-01 18:18:12,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163862734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:12,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200168730] [2022-03-01 18:18:12,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:12,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:12,071 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 18:18:12,072 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 18:18:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:12,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:12,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,570 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 42 treesize of output 30 [2022-03-01 18:18:12,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:12,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:12,709 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 30 treesize of output 55 [2022-03-01 18:18:12,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:12,778 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 30 treesize of output 14 [2022-03-01 18:18:12,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,882 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:12,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:12,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:12,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:13,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200168730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:13,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:13,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:13,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878344619] [2022-03-01 18:18:13,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:13,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:13,005 INFO L87 Difference]: Start difference. First operand 8822 states and 32628 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:18:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:13,459 INFO L93 Difference]: Finished difference Result 11894 states and 42962 transitions. [2022-03-01 18:18:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:18:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:18:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:13,487 INFO L225 Difference]: With dead ends: 11894 [2022-03-01 18:18:13,487 INFO L226 Difference]: Without dead ends: 11879 [2022-03-01 18:18:13,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:18:13,488 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:13,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 243 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 538 Invalid, 0 Unknown, 441 Unchecked, 0.3s Time] [2022-03-01 18:18:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2022-03-01 18:18:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 8855. [2022-03-01 18:18:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8855 states, 8854 states have (on average 3.6974248927038627) internal successors, (32737), 8854 states have internal predecessors, (32737), 0 states have call successors, (0), 0 states 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 18:18:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8855 states to 8855 states and 32737 transitions. [2022-03-01 18:18:13,663 INFO L78 Accepts]: Start accepts. Automaton has 8855 states and 32737 transitions. Word has length 28 [2022-03-01 18:18:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:13,663 INFO L470 AbstractCegarLoop]: Abstraction has 8855 states and 32737 transitions. [2022-03-01 18:18:13,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:18:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8855 states and 32737 transitions. [2022-03-01 18:18:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:13,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:13,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:13,694 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 18:18:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-01 18:18:13,894 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1167629766, now seen corresponding path program 32 times [2022-03-01 18:18:13,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:13,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189553875] [2022-03-01 18:18:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:13,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189553875] [2022-03-01 18:18:14,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189553875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898973793] [2022-03-01 18:18:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:14,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:14,118 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 18:18:14,119 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 18:18:14,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:14,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:14,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,498 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 42 treesize of output 30 [2022-03-01 18:18:14,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:14,648 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:14,648 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 30 treesize of output 55 [2022-03-01 18:18:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:14,696 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 31 treesize of output 15 [2022-03-01 18:18:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,785 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:14,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:14,856 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 23 treesize of output 6 [2022-03-01 18:18:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898973793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:14,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:14,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:14,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236030679] [2022-03-01 18:18:14,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:14,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:14,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:14,914 INFO L87 Difference]: Start difference. First operand 8855 states and 32737 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:15,642 INFO L93 Difference]: Finished difference Result 12220 states and 43941 transitions. [2022-03-01 18:18:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:18:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:15,670 INFO L225 Difference]: With dead ends: 12220 [2022-03-01 18:18:15,671 INFO L226 Difference]: Without dead ends: 12163 [2022-03-01 18:18:15,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:18:15,671 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:15,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 271 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 332 Unchecked, 0.4s Time] [2022-03-01 18:18:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2022-03-01 18:18:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 8839. [2022-03-01 18:18:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.6989137813985065) internal successors, (32691), 8838 states have internal predecessors, (32691), 0 states have call successors, (0), 0 states 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 18:18:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32691 transitions. [2022-03-01 18:18:15,847 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32691 transitions. Word has length 28 [2022-03-01 18:18:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 8839 states and 32691 transitions. [2022-03-01 18:18:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32691 transitions. [2022-03-01 18:18:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:15,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:15,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:15,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:16,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:16,064 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -730861046, now seen corresponding path program 33 times [2022-03-01 18:18:16,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:16,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093616733] [2022-03-01 18:18:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:16,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:16,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093616733] [2022-03-01 18:18:16,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093616733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:16,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012153461] [2022-03-01 18:18:16,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:16,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:16,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:16,251 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 18:18:16,252 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 18:18:16,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:16,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:18:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:16,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:16,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:16,507 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 37 treesize of output 53 [2022-03-01 18:18:16,519 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 81 treesize of output 69 [2022-03-01 18:18:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:17,024 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 64 treesize of output 68 [2022-03-01 18:18:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:17,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:18,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:18,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:18,269 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 50 treesize of output 47 [2022-03-01 18:18:18,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:18,591 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 41 treesize of output 74 [2022-03-01 18:18:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012153461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:18,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:18,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-01 18:18:18,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013876121] [2022-03-01 18:18:18,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:18,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:18,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:18,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:18,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:18,888 INFO L87 Difference]: Start difference. First operand 8839 states and 32691 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 18:18:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:21,344 INFO L93 Difference]: Finished difference Result 16943 states and 59870 transitions. [2022-03-01 18:18:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:18:21,345 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 28 [2022-03-01 18:18:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:21,393 INFO L225 Difference]: With dead ends: 16943 [2022-03-01 18:18:21,393 INFO L226 Difference]: Without dead ends: 16929 [2022-03-01 18:18:21,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=985, Invalid=5021, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:18:21,395 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2571 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:21,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 538 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 540 Invalid, 0 Unknown, 2571 Unchecked, 0.3s Time] [2022-03-01 18:18:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16929 states. [2022-03-01 18:18:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16929 to 8966. [2022-03-01 18:18:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 3.6847741215839376) internal successors, (33034), 8965 states have internal predecessors, (33034), 0 states have call successors, (0), 0 states 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 18:18:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 33034 transitions. [2022-03-01 18:18:21,668 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 33034 transitions. Word has length 28 [2022-03-01 18:18:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 33034 transitions. [2022-03-01 18:18:21,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 18:18:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 33034 transitions. [2022-03-01 18:18:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:21,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:21,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:21,700 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 18:18:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 18:18:21,900 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -633137262, now seen corresponding path program 34 times [2022-03-01 18:18:21,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:21,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111031628] [2022-03-01 18:18:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:22,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:22,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111031628] [2022-03-01 18:18:22,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111031628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:22,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103969678] [2022-03-01 18:18:22,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:22,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:22,080 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 18:18:22,081 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 18:18:22,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:22,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:22,442 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 24 treesize of output 20 [2022-03-01 18:18:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,450 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 39 treesize of output 27 [2022-03-01 18:18:22,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:22,625 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:22,625 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 30 treesize of output 55 [2022-03-01 18:18:22,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,694 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 31 treesize of output 15 [2022-03-01 18:18:22,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,763 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:22,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,819 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 23 treesize of output 6 [2022-03-01 18:18:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:22,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103969678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:22,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:22,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:22,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165275114] [2022-03-01 18:18:22,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:22,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:22,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:22,856 INFO L87 Difference]: Start difference. First operand 8966 states and 33034 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:23,468 INFO L93 Difference]: Finished difference Result 13399 states and 47952 transitions. [2022-03-01 18:18:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:23,500 INFO L225 Difference]: With dead ends: 13399 [2022-03-01 18:18:23,500 INFO L226 Difference]: Without dead ends: 13384 [2022-03-01 18:18:23,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:18:23,501 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:23,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 291 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 572 Invalid, 0 Unknown, 492 Unchecked, 0.3s Time] [2022-03-01 18:18:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2022-03-01 18:18:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 9007. [2022-03-01 18:18:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9007 states, 9006 states have (on average 3.681545636242505) internal successors, (33156), 9006 states have internal predecessors, (33156), 0 states have call successors, (0), 0 states 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 18:18:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9007 states to 9007 states and 33156 transitions. [2022-03-01 18:18:23,684 INFO L78 Accepts]: Start accepts. Automaton has 9007 states and 33156 transitions. Word has length 28 [2022-03-01 18:18:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 9007 states and 33156 transitions. [2022-03-01 18:18:23,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9007 states and 33156 transitions. [2022-03-01 18:18:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:23,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:23,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:23,716 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 18:18:23,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:23,901 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2015332598, now seen corresponding path program 35 times [2022-03-01 18:18:23,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:23,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513336393] [2022-03-01 18:18:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:23,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:24,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513336393] [2022-03-01 18:18:24,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513336393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:24,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094622706] [2022-03-01 18:18:24,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:24,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:24,142 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 18:18:24,143 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 18:18:24,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:24,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:24,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:24,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:24,631 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 42 treesize of output 30 [2022-03-01 18:18:24,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:18:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:24,799 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:24,800 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 30 treesize of output 55 [2022-03-01 18:18:24,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:24,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:24,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 18:18:24,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:24,959 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:24,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:25,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,011 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 23 treesize of output 6 [2022-03-01 18:18:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094622706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:25,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:25,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:25,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467560291] [2022-03-01 18:18:25,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:25,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:25,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:25,053 INFO L87 Difference]: Start difference. First operand 9007 states and 33156 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:25,673 INFO L93 Difference]: Finished difference Result 13221 states and 47328 transitions. [2022-03-01 18:18:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:18:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:25,707 INFO L225 Difference]: With dead ends: 13221 [2022-03-01 18:18:25,707 INFO L226 Difference]: Without dead ends: 13187 [2022-03-01 18:18:25,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:25,709 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:25,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 657 Invalid, 0 Unknown, 435 Unchecked, 0.3s Time] [2022-03-01 18:18:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13187 states. [2022-03-01 18:18:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13187 to 8999. [2022-03-01 18:18:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 3.6830406757057124) internal successors, (33140), 8998 states have internal predecessors, (33140), 0 states have call successors, (0), 0 states 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 18:18:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 33140 transitions. [2022-03-01 18:18:25,904 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 33140 transitions. Word has length 28 [2022-03-01 18:18:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:25,904 INFO L470 AbstractCegarLoop]: Abstraction has 8999 states and 33140 transitions. [2022-03-01 18:18:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 33140 transitions. [2022-03-01 18:18:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:25,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:25,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:25,938 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 18:18:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 18:18:26,135 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1227555526, now seen corresponding path program 36 times [2022-03-01 18:18:26,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:26,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846372279] [2022-03-01 18:18:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:26,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846372279] [2022-03-01 18:18:26,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846372279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:26,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802630143] [2022-03-01 18:18:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:26,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:26,376 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 18:18:26,377 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 18:18:26,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:18:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:18:26,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:26,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:26,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:18:26,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:18:26,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:18:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:26,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:27,009 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:27,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 55 [2022-03-01 18:18:27,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:27,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:27,083 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 31 treesize of output 15 [2022-03-01 18:18:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:27,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:27,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-03-01 18:18:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:27,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802630143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:27,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:27,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:18:27,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178010250] [2022-03-01 18:18:27,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:27,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:18:27,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:18:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:18:27,310 INFO L87 Difference]: Start difference. First operand 8999 states and 33140 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 18:18:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:30,646 INFO L93 Difference]: Finished difference Result 13903 states and 48779 transitions. [2022-03-01 18:18:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:18:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 28 [2022-03-01 18:18:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:30,690 INFO L225 Difference]: With dead ends: 13903 [2022-03-01 18:18:30,690 INFO L226 Difference]: Without dead ends: 13889 [2022-03-01 18:18:30,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=765, Invalid=6375, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:18:30,692 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 255 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:30,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 514 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1161 Invalid, 0 Unknown, 867 Unchecked, 0.7s Time] [2022-03-01 18:18:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-03-01 18:18:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 9127. [2022-03-01 18:18:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 3.6725838264299804) internal successors, (33516), 9126 states have internal predecessors, (33516), 0 states have call successors, (0), 0 states 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 18:18:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 33516 transitions. [2022-03-01 18:18:30,954 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 33516 transitions. Word has length 28 [2022-03-01 18:18:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 9127 states and 33516 transitions. [2022-03-01 18:18:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 18:18:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 33516 transitions. [2022-03-01 18:18:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:30,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:30,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:30,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:31,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 18:18:31,195 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 823881094, now seen corresponding path program 37 times [2022-03-01 18:18:31,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:31,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425233401] [2022-03-01 18:18:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:31,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:31,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425233401] [2022-03-01 18:18:31,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425233401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:31,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782753445] [2022-03-01 18:18:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:31,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:31,443 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 18:18:31,445 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 18:18:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:31,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:31,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:32,009 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 24 treesize of output 20 [2022-03-01 18:18:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:32,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,013 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 39 treesize of output 27 [2022-03-01 18:18:32,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:18:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:32,181 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:32,181 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 30 treesize of output 55 [2022-03-01 18:18:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:32,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:18:32,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,345 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:32,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:32,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:32,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782753445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:32,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:32,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:32,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821443301] [2022-03-01 18:18:32,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:32,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:32,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:32,482 INFO L87 Difference]: Start difference. First operand 9127 states and 33516 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:33,274 INFO L93 Difference]: Finished difference Result 13322 states and 47695 transitions. [2022-03-01 18:18:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:18:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:33,302 INFO L225 Difference]: With dead ends: 13322 [2022-03-01 18:18:33,302 INFO L226 Difference]: Without dead ends: 13319 [2022-03-01 18:18:33,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:18:33,302 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:33,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 328 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 675 Invalid, 0 Unknown, 590 Unchecked, 0.3s Time] [2022-03-01 18:18:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13319 states. [2022-03-01 18:18:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13319 to 9129. [2022-03-01 18:18:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 9128 states have (on average 3.673751095530237) internal successors, (33534), 9128 states have internal predecessors, (33534), 0 states have call successors, (0), 0 states 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 18:18:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 33534 transitions. [2022-03-01 18:18:33,481 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 33534 transitions. Word has length 28 [2022-03-01 18:18:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:33,482 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 33534 transitions. [2022-03-01 18:18:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:18:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 33534 transitions. [2022-03-01 18:18:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:33,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:33,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:33,513 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 18:18:33,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:18:33,706 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash 865506314, now seen corresponding path program 38 times [2022-03-01 18:18:33,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:33,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492563828] [2022-03-01 18:18:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492563828] [2022-03-01 18:18:33,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492563828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99380272] [2022-03-01 18:18:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:33,910 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 18:18:33,911 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 18:18:33,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:33,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:34,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,304 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 42 treesize of output 30 [2022-03-01 18:18:34,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:18:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:34,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:34,432 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:34,432 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 30 treesize of output 55 [2022-03-01 18:18:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:18:34,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,563 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:34,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:18:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:34,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99380272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:34,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:34,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:18:34,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780935112] [2022-03-01 18:18:34,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:34,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:34,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:34,670 INFO L87 Difference]: Start difference. First operand 9129 states and 33534 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:18:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:35,298 INFO L93 Difference]: Finished difference Result 13328 states and 47713 transitions. [2022-03-01 18:18:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:18:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:35,336 INFO L225 Difference]: With dead ends: 13328 [2022-03-01 18:18:35,336 INFO L226 Difference]: Without dead ends: 13313 [2022-03-01 18:18:35,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:18:35,337 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:35,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 351 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 609 Invalid, 0 Unknown, 463 Unchecked, 0.3s Time] [2022-03-01 18:18:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13313 states. [2022-03-01 18:18:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13313 to 9111. [2022-03-01 18:18:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 3.675740944017563) internal successors, (33486), 9110 states have internal predecessors, (33486), 0 states have call successors, (0), 0 states 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 18:18:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 33486 transitions. [2022-03-01 18:18:35,540 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 33486 transitions. Word has length 28 [2022-03-01 18:18:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:35,540 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 33486 transitions. [2022-03-01 18:18:35,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:18:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 33486 transitions. [2022-03-01 18:18:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:35,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:35,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:35,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 18:18:35,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 18:18:35,758 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 20287918, now seen corresponding path program 39 times [2022-03-01 18:18:35,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:35,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264916036] [2022-03-01 18:18:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:36,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:36,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264916036] [2022-03-01 18:18:36,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264916036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:36,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312664494] [2022-03-01 18:18:36,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:36,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:36,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:36,003 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:36,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:18:36,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:18:36,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:18:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:36,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:36,504 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 31 treesize of output 27 [2022-03-01 18:18:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:36,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:36,516 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 43 treesize of output 47 [2022-03-01 18:18:36,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:36,709 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 72 treesize of output 72 [2022-03-01 18:18:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:37,277 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:18:37,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 79 [2022-03-01 18:18:37,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:37,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:37,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:37,735 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 60 treesize of output 55 [2022-03-01 18:18:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312664494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:37,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:37,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:18:37,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464144484] [2022-03-01 18:18:37,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:37,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:18:37,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:18:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:18:37,818 INFO L87 Difference]: Start difference. First operand 9111 states and 33486 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:39,328 INFO L93 Difference]: Finished difference Result 13805 states and 49324 transitions. [2022-03-01 18:18:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:18:39,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:18:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:39,366 INFO L225 Difference]: With dead ends: 13805 [2022-03-01 18:18:39,366 INFO L226 Difference]: Without dead ends: 13791 [2022-03-01 18:18:39,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=613, Invalid=3547, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:18:39,368 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:39,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 376 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 594 Invalid, 0 Unknown, 757 Unchecked, 0.3s Time] [2022-03-01 18:18:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13791 states. [2022-03-01 18:18:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13791 to 9174. [2022-03-01 18:18:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9174 states, 9173 states have (on average 3.67011882699226) internal successors, (33666), 9173 states have internal predecessors, (33666), 0 states have call successors, (0), 0 states 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 18:18:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 33666 transitions. [2022-03-01 18:18:39,647 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 33666 transitions. Word has length 28 [2022-03-01 18:18:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:39,647 INFO L470 AbstractCegarLoop]: Abstraction has 9174 states and 33666 transitions. [2022-03-01 18:18:39,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 33666 transitions. [2022-03-01 18:18:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:39,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:39,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:39,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 18:18:39,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 18:18:39,879 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2141582734, now seen corresponding path program 40 times [2022-03-01 18:18:39,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:39,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323631229] [2022-03-01 18:18:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:40,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:40,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323631229] [2022-03-01 18:18:40,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323631229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:40,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482177597] [2022-03-01 18:18:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:40,067 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:40,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:18:40,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:40,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:40,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:40,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,345 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 42 treesize of output 30 [2022-03-01 18:18:40,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:18:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:40,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:40,518 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:40,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-03-01 18:18:40,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:40,577 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 31 treesize of output 15 [2022-03-01 18:18:40,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,664 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:40,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:40,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:40,711 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 23 treesize of output 6 [2022-03-01 18:18:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:40,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482177597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:40,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:40,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:40,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693118409] [2022-03-01 18:18:40,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:40,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:40,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:40,749 INFO L87 Difference]: Start difference. First operand 9174 states and 33666 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:41,315 INFO L93 Difference]: Finished difference Result 12418 states and 44477 transitions. [2022-03-01 18:18:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:41,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:41,344 INFO L225 Difference]: With dead ends: 12418 [2022-03-01 18:18:41,344 INFO L226 Difference]: Without dead ends: 12403 [2022-03-01 18:18:41,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:18:41,346 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:41,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 238 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 815 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-03-01 18:18:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12403 states. [2022-03-01 18:18:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12403 to 9094. [2022-03-01 18:18:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9094 states, 9093 states have (on average 3.6804135048938744) internal successors, (33466), 9093 states have internal predecessors, (33466), 0 states have call successors, (0), 0 states 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 18:18:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9094 states to 9094 states and 33466 transitions. [2022-03-01 18:18:41,514 INFO L78 Accepts]: Start accepts. Automaton has 9094 states and 33466 transitions. Word has length 28 [2022-03-01 18:18:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 9094 states and 33466 transitions. [2022-03-01 18:18:41,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 9094 states and 33466 transitions. [2022-03-01 18:18:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:41,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:41,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:41,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:41,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:18:41,749 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash -887489994, now seen corresponding path program 41 times [2022-03-01 18:18:41,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:41,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058229580] [2022-03-01 18:18:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:41,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:41,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058229580] [2022-03-01 18:18:41,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058229580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:41,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032495528] [2022-03-01 18:18:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:41,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:41,996 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:41,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:18:42,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:18:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:42,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:42,547 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 46 treesize of output 34 [2022-03-01 18:18:42,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:18:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:42,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:42,750 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:42,750 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 30 treesize of output 55 [2022-03-01 18:18:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:42,849 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 31 treesize of output 15 [2022-03-01 18:18:42,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:42,976 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:42,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:43,063 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-01 18:18:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032495528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:43,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:43,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:43,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110068127] [2022-03-01 18:18:43,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:43,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:43,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:43,137 INFO L87 Difference]: Start difference. First operand 9094 states and 33466 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:43,983 INFO L93 Difference]: Finished difference Result 13252 states and 47549 transitions. [2022-03-01 18:18:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:18:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:44,021 INFO L225 Difference]: With dead ends: 13252 [2022-03-01 18:18:44,022 INFO L226 Difference]: Without dead ends: 13245 [2022-03-01 18:18:44,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:18:44,022 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 125 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:44,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 261 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 650 Invalid, 0 Unknown, 403 Unchecked, 0.4s Time] [2022-03-01 18:18:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2022-03-01 18:18:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 9097. [2022-03-01 18:18:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9097 states, 9096 states have (on average 3.680079155672823) internal successors, (33474), 9096 states have internal predecessors, (33474), 0 states have call successors, (0), 0 states 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 18:18:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9097 states to 9097 states and 33474 transitions. [2022-03-01 18:18:44,275 INFO L78 Accepts]: Start accepts. Automaton has 9097 states and 33474 transitions. Word has length 28 [2022-03-01 18:18:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:44,275 INFO L470 AbstractCegarLoop]: Abstraction has 9097 states and 33474 transitions. [2022-03-01 18:18:44,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9097 states and 33474 transitions. [2022-03-01 18:18:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:44,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:44,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:44,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 18:18:44,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-01 18:18:44,507 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1524168138, now seen corresponding path program 42 times [2022-03-01 18:18:44,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:44,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995603062] [2022-03-01 18:18:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:44,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:44,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995603062] [2022-03-01 18:18:44,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995603062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692802171] [2022-03-01 18:18:44,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:44,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:44,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:44,748 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:44,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:18:44,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:44,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:45,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:45,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,213 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 46 treesize of output 34 [2022-03-01 18:18:45,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:45,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:45,358 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:45,358 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 30 treesize of output 55 [2022-03-01 18:18:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:45,408 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 31 treesize of output 15 [2022-03-01 18:18:45,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,490 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:45,490 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:45,563 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 23 treesize of output 6 [2022-03-01 18:18:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:45,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692802171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:45,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:45,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:45,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037101116] [2022-03-01 18:18:45,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:45,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:45,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:45,618 INFO L87 Difference]: Start difference. First operand 9097 states and 33474 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:46,086 INFO L93 Difference]: Finished difference Result 12469 states and 44728 transitions. [2022-03-01 18:18:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:18:46,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:46,118 INFO L225 Difference]: With dead ends: 12469 [2022-03-01 18:18:46,118 INFO L226 Difference]: Without dead ends: 12454 [2022-03-01 18:18:46,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:18:46,119 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:46,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 213 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 419 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-03-01 18:18:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12454 states. [2022-03-01 18:18:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12454 to 9172. [2022-03-01 18:18:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9172 states, 9171 states have (on average 3.6757169338131064) internal successors, (33710), 9171 states have internal predecessors, (33710), 0 states have call successors, (0), 0 states 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 18:18:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9172 states to 9172 states and 33710 transitions. [2022-03-01 18:18:46,298 INFO L78 Accepts]: Start accepts. Automaton has 9172 states and 33710 transitions. Word has length 28 [2022-03-01 18:18:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:46,298 INFO L470 AbstractCegarLoop]: Abstraction has 9172 states and 33710 transitions. [2022-03-01 18:18:46,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9172 states and 33710 transitions. [2022-03-01 18:18:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:46,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:46,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:46,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:46,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:46,529 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1273862414, now seen corresponding path program 43 times [2022-03-01 18:18:46,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:46,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143780727] [2022-03-01 18:18:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:46,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:46,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143780727] [2022-03-01 18:18:46,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143780727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:46,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838038786] [2022-03-01 18:18:46,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:46,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:46,784 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:46,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:18:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:47,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,100 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 42 treesize of output 30 [2022-03-01 18:18:47,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:47,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:47,283 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:47,283 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 30 treesize of output 55 [2022-03-01 18:18:47,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:47,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 18:18:47,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,422 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:47,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:47,476 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 23 treesize of output 6 [2022-03-01 18:18:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:47,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838038786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:47,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:47,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:47,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648441197] [2022-03-01 18:18:47,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:47,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:47,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:47,523 INFO L87 Difference]: Start difference. First operand 9172 states and 33710 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:47,970 INFO L93 Difference]: Finished difference Result 12408 states and 44563 transitions. [2022-03-01 18:18:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:18:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:47,999 INFO L225 Difference]: With dead ends: 12408 [2022-03-01 18:18:47,999 INFO L226 Difference]: Without dead ends: 12393 [2022-03-01 18:18:48,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:18:48,000 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:48,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 204 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 656 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-03-01 18:18:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2022-03-01 18:18:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 9193. [2022-03-01 18:18:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.675587467362924) internal successors, (33786), 9192 states have internal predecessors, (33786), 0 states have call successors, (0), 0 states 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 18:18:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33786 transitions. [2022-03-01 18:18:48,173 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33786 transitions. Word has length 28 [2022-03-01 18:18:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:48,173 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33786 transitions. [2022-03-01 18:18:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33786 transitions. [2022-03-01 18:18:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:48,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:48,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:48,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 18:18:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 18:18:48,403 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1478357238, now seen corresponding path program 44 times [2022-03-01 18:18:48,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:48,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200007635] [2022-03-01 18:18:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:48,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:48,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200007635] [2022-03-01 18:18:48,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200007635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:48,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892746066] [2022-03-01 18:18:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:48,611 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:48,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:18:48,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:48,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:48,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:48,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,008 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 42 treesize of output 30 [2022-03-01 18:18:49,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:18:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:49,155 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:49,155 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 30 treesize of output 55 [2022-03-01 18:18:49,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:49,216 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 31 treesize of output 15 [2022-03-01 18:18:49,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,285 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:49,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:49,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:49,334 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 23 treesize of output 6 [2022-03-01 18:18:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892746066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:49,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:49,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:49,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263517381] [2022-03-01 18:18:49,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:49,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:49,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:49,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:49,382 INFO L87 Difference]: Start difference. First operand 9193 states and 33786 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:49,981 INFO L93 Difference]: Finished difference Result 13437 states and 48057 transitions. [2022-03-01 18:18:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:18:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:50,014 INFO L225 Difference]: With dead ends: 13437 [2022-03-01 18:18:50,014 INFO L226 Difference]: Without dead ends: 13403 [2022-03-01 18:18:50,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:50,015 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 191 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:50,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 224 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 589 Invalid, 0 Unknown, 500 Unchecked, 0.3s Time] [2022-03-01 18:18:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13403 states. [2022-03-01 18:18:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13403 to 9206. [2022-03-01 18:18:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 3.6744160782183597) internal successors, (33823), 9205 states have internal predecessors, (33823), 0 states have call successors, (0), 0 states 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 18:18:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 33823 transitions. [2022-03-01 18:18:50,233 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 33823 transitions. Word has length 28 [2022-03-01 18:18:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:50,233 INFO L470 AbstractCegarLoop]: Abstraction has 9206 states and 33823 transitions. [2022-03-01 18:18:50,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 33823 transitions. [2022-03-01 18:18:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:50,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:50,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:50,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 18:18:50,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:50,455 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1764530886, now seen corresponding path program 45 times [2022-03-01 18:18:50,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:50,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167038301] [2022-03-01 18:18:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:50,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:50,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167038301] [2022-03-01 18:18:50,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167038301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:50,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652595848] [2022-03-01 18:18:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:50,651 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:18:50,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:50,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:51,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,010 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 42 treesize of output 30 [2022-03-01 18:18:51,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:51,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:51,193 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:51,193 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 30 treesize of output 55 [2022-03-01 18:18:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:51,248 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 31 treesize of output 15 [2022-03-01 18:18:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,321 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:51,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:51,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:51,374 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 23 treesize of output 6 [2022-03-01 18:18:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:51,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652595848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:51,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:51,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:51,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433154056] [2022-03-01 18:18:51,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:51,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:51,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:51,420 INFO L87 Difference]: Start difference. First operand 9206 states and 33823 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:51,962 INFO L93 Difference]: Finished difference Result 12508 states and 44818 transitions. [2022-03-01 18:18:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:51,992 INFO L225 Difference]: With dead ends: 12508 [2022-03-01 18:18:51,992 INFO L226 Difference]: Without dead ends: 12493 [2022-03-01 18:18:51,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:18:51,993 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:51,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 230 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 742 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-03-01 18:18:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2022-03-01 18:18:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 9248. [2022-03-01 18:18:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9248 states, 9247 states have (on average 3.6707040121120365) internal successors, (33943), 9247 states have internal predecessors, (33943), 0 states have call successors, (0), 0 states 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 18:18:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9248 states to 9248 states and 33943 transitions. [2022-03-01 18:18:52,173 INFO L78 Accepts]: Start accepts. Automaton has 9248 states and 33943 transitions. Word has length 28 [2022-03-01 18:18:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:52,173 INFO L470 AbstractCegarLoop]: Abstraction has 9248 states and 33943 transitions. [2022-03-01 18:18:52,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9248 states and 33943 transitions. [2022-03-01 18:18:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:52,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:52,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:52,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:52,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:52,392 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash -566926770, now seen corresponding path program 46 times [2022-03-01 18:18:52,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:52,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342431631] [2022-03-01 18:18:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:52,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:52,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342431631] [2022-03-01 18:18:52,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342431631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:52,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439240221] [2022-03-01 18:18:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:52,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:52,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:52,673 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:52,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:18:52,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:52,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:53,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:53,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,085 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 46 treesize of output 34 [2022-03-01 18:18:53,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:53,251 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:53,255 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 30 treesize of output 55 [2022-03-01 18:18:53,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:53,323 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 31 treesize of output 15 [2022-03-01 18:18:53,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,402 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:53,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:53,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:53,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:53,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-01 18:18:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:53,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439240221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:53,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:53,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:53,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585109391] [2022-03-01 18:18:53,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:53,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:53,519 INFO L87 Difference]: Start difference. First operand 9248 states and 33943 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:54,265 INFO L93 Difference]: Finished difference Result 13515 states and 48265 transitions. [2022-03-01 18:18:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:18:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:54,301 INFO L225 Difference]: With dead ends: 13515 [2022-03-01 18:18:54,301 INFO L226 Difference]: Without dead ends: 13481 [2022-03-01 18:18:54,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:54,302 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 169 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:54,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 222 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 686 Invalid, 0 Unknown, 406 Unchecked, 0.4s Time] [2022-03-01 18:18:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13481 states. [2022-03-01 18:18:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13481 to 9257. [2022-03-01 18:18:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 3.6697277441659466) internal successors, (33967), 9256 states have internal predecessors, (33967), 0 states have call successors, (0), 0 states 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 18:18:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 33967 transitions. [2022-03-01 18:18:54,505 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 33967 transitions. Word has length 28 [2022-03-01 18:18:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 33967 transitions. [2022-03-01 18:18:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 33967 transitions. [2022-03-01 18:18:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:54,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:54,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:54,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:54,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 18:18:54,735 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1619005942, now seen corresponding path program 47 times [2022-03-01 18:18:54,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:54,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404997504] [2022-03-01 18:18:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:54,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:54,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404997504] [2022-03-01 18:18:54,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404997504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:54,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333811055] [2022-03-01 18:18:54,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:54,940 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:54,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:18:54,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:18:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:55,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:18:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:55,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,310 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 46 treesize of output 34 [2022-03-01 18:18:55,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:18:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:55,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:55,500 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:18:55,500 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 30 treesize of output 55 [2022-03-01 18:18:55,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:55,557 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 31 treesize of output 15 [2022-03-01 18:18:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,634 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:55,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:55,685 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 23 treesize of output 6 [2022-03-01 18:18:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:55,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333811055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:55,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:55,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:18:55,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691029068] [2022-03-01 18:18:55,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:55,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:18:55,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:18:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:55,724 INFO L87 Difference]: Start difference. First operand 9257 states and 33967 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:56,188 INFO L93 Difference]: Finished difference Result 12480 states and 44746 transitions. [2022-03-01 18:18:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:18:56,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:18:56,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:56,221 INFO L225 Difference]: With dead ends: 12480 [2022-03-01 18:18:56,221 INFO L226 Difference]: Without dead ends: 12465 [2022-03-01 18:18:56,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:18:56,222 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:56,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 249 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 711 Invalid, 0 Unknown, 243 Unchecked, 0.2s Time] [2022-03-01 18:18:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2022-03-01 18:18:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 9233. [2022-03-01 18:18:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9233 states, 9232 states have (on average 3.6721187175043326) internal successors, (33901), 9232 states have internal predecessors, (33901), 0 states have call successors, (0), 0 states 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 18:18:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9233 states to 9233 states and 33901 transitions. [2022-03-01 18:18:56,395 INFO L78 Accepts]: Start accepts. Automaton has 9233 states and 33901 transitions. Word has length 28 [2022-03-01 18:18:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 9233 states and 33901 transitions. [2022-03-01 18:18:56,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:18:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9233 states and 33901 transitions. [2022-03-01 18:18:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:18:56,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:56,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:56,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:56,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 18:18:56,627 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash -358633462, now seen corresponding path program 48 times [2022-03-01 18:18:56,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:56,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714690129] [2022-03-01 18:18:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:56,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:56,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714690129] [2022-03-01 18:18:56,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714690129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:56,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517878693] [2022-03-01 18:18:56,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:56,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:56,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:56,903 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:56,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:18:56,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:56,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:56,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:18:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:57,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:18:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,226 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 49 treesize of output 37 [2022-03-01 18:18:57,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:57,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 39 [2022-03-01 18:18:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:57,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:57,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:57,624 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 58 treesize of output 53 [2022-03-01 18:18:57,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,715 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:18:57,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:18:57,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:57,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-01 18:18:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:57,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517878693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:57,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:57,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-01 18:18:57,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712631131] [2022-03-01 18:18:57,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:57,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:18:57,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:18:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:18:57,827 INFO L87 Difference]: Start difference. First operand 9233 states and 33901 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:19:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:00,168 INFO L93 Difference]: Finished difference Result 17577 states and 61761 transitions. [2022-03-01 18:19:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 18:19:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 28 [2022-03-01 18:19:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:00,226 INFO L225 Difference]: With dead ends: 17577 [2022-03-01 18:19:00,226 INFO L226 Difference]: Without dead ends: 17521 [2022-03-01 18:19:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=655, Invalid=3505, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:19:00,227 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 291 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1575 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:00,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 535 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 904 Invalid, 0 Unknown, 1575 Unchecked, 0.5s Time] [2022-03-01 18:19:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17521 states. [2022-03-01 18:19:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17521 to 9214. [2022-03-01 18:19:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9214 states, 9213 states have (on average 3.6755671333984585) internal successors, (33863), 9213 states have internal predecessors, (33863), 0 states have call successors, (0), 0 states 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 18:19:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9214 states to 9214 states and 33863 transitions. [2022-03-01 18:19:00,506 INFO L78 Accepts]: Start accepts. Automaton has 9214 states and 33863 transitions. Word has length 28 [2022-03-01 18:19:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:00,506 INFO L470 AbstractCegarLoop]: Abstraction has 9214 states and 33863 transitions. [2022-03-01 18:19:00,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:19:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9214 states and 33863 transitions. [2022-03-01 18:19:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:00,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:00,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:00,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:19:00,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 18:19:00,739 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 557263278, now seen corresponding path program 49 times [2022-03-01 18:19:00,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:00,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673553737] [2022-03-01 18:19:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:01,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673553737] [2022-03-01 18:19:01,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673553737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:01,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104294509] [2022-03-01 18:19:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:01,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:01,080 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:01,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:19:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:01,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:01,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:01,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,527 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 46 treesize of output 34 [2022-03-01 18:19:01,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:19:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:01,745 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:01,745 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 30 treesize of output 55 [2022-03-01 18:19:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:01,823 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 31 treesize of output 15 [2022-03-01 18:19:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,913 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:01,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:01,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:01,988 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 23 treesize of output 6 [2022-03-01 18:19:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:02,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104294509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:02,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:02,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:19:02,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314396596] [2022-03-01 18:19:02,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:02,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:19:02,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:19:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:19:02,053 INFO L87 Difference]: Start difference. First operand 9214 states and 33863 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:02,823 INFO L93 Difference]: Finished difference Result 12459 states and 44686 transitions. [2022-03-01 18:19:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:19:02,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:19:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:02,867 INFO L225 Difference]: With dead ends: 12459 [2022-03-01 18:19:02,867 INFO L226 Difference]: Without dead ends: 12444 [2022-03-01 18:19:02,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:19:02,868 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:02,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 866 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-03-01 18:19:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2022-03-01 18:19:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 9212. [2022-03-01 18:19:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9212 states, 9211 states have (on average 3.675605254586907) internal successors, (33856), 9211 states have internal predecessors, (33856), 0 states have call successors, (0), 0 states 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 18:19:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9212 states to 9212 states and 33856 transitions. [2022-03-01 18:19:03,103 INFO L78 Accepts]: Start accepts. Automaton has 9212 states and 33856 transitions. Word has length 28 [2022-03-01 18:19:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:03,103 INFO L470 AbstractCegarLoop]: Abstraction has 9212 states and 33856 transitions. [2022-03-01 18:19:03,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9212 states and 33856 transitions. [2022-03-01 18:19:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:03,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:03,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:03,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:03,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 18:19:03,345 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash -844598138, now seen corresponding path program 50 times [2022-03-01 18:19:03,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:03,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178572067] [2022-03-01 18:19:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:03,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:03,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:03,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178572067] [2022-03-01 18:19:03,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178572067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:03,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066802604] [2022-03-01 18:19:03,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:03,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:03,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:03,586 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:03,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:19:03,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:03,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:19:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,215 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 46 treesize of output 34 [2022-03-01 18:19:04,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:04,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:04,413 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:04,413 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 30 treesize of output 55 [2022-03-01 18:19:04,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:04,499 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 30 treesize of output 14 [2022-03-01 18:19:04,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,595 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:04,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:04,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:04,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066802604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:04,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:04,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:04,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657645830] [2022-03-01 18:19:04,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:04,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:04,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:04,753 INFO L87 Difference]: Start difference. First operand 9212 states and 33856 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:05,775 INFO L93 Difference]: Finished difference Result 12859 states and 45822 transitions. [2022-03-01 18:19:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:19:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:19:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:05,818 INFO L225 Difference]: With dead ends: 12859 [2022-03-01 18:19:05,818 INFO L226 Difference]: Without dead ends: 12835 [2022-03-01 18:19:05,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:05,819 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:05,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 220 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 659 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-03-01 18:19:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-03-01 18:19:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 9173. [2022-03-01 18:19:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9173 states, 9172 states have (on average 3.6788050588748367) internal successors, (33742), 9172 states have internal predecessors, (33742), 0 states have call successors, (0), 0 states 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 18:19:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9173 states to 9173 states and 33742 transitions. [2022-03-01 18:19:06,041 INFO L78 Accepts]: Start accepts. Automaton has 9173 states and 33742 transitions. Word has length 28 [2022-03-01 18:19:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 9173 states and 33742 transitions. [2022-03-01 18:19:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 9173 states and 33742 transitions. [2022-03-01 18:19:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:06,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:06,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:06,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:06,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:19:06,286 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1324401978, now seen corresponding path program 51 times [2022-03-01 18:19:06,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:06,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874725526] [2022-03-01 18:19:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:06,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:06,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874725526] [2022-03-01 18:19:06,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874725526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:06,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207209159] [2022-03-01 18:19:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:06,493 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:06,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:19:06,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:06,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:06,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:19:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:06,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:06,966 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 42 treesize of output 30 [2022-03-01 18:19:06,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:19:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:07,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:07,131 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:07,132 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 30 treesize of output 55 [2022-03-01 18:19:07,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:07,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:07,190 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 31 treesize of output 15 [2022-03-01 18:19:07,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:07,275 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:07,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:07,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-03-01 18:19:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:07,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207209159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:07,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:07,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:19:07,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043581618] [2022-03-01 18:19:07,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:07,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:19:07,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:19:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:19:07,398 INFO L87 Difference]: Start difference. First operand 9173 states and 33742 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:08,039 INFO L93 Difference]: Finished difference Result 13377 states and 47974 transitions. [2022-03-01 18:19:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:19:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:19:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:08,072 INFO L225 Difference]: With dead ends: 13377 [2022-03-01 18:19:08,072 INFO L226 Difference]: Without dead ends: 13370 [2022-03-01 18:19:08,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:19:08,072 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:08,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 265 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 705 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2022-03-01 18:19:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13370 states. [2022-03-01 18:19:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13370 to 9171. [2022-03-01 18:19:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.678516902944384) internal successors, (33732), 9170 states have internal predecessors, (33732), 0 states have call successors, (0), 0 states 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 18:19:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 33732 transitions. [2022-03-01 18:19:08,266 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 33732 transitions. Word has length 28 [2022-03-01 18:19:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 9171 states and 33732 transitions. [2022-03-01 18:19:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 33732 transitions. [2022-03-01 18:19:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:08,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:08,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:08,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:08,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:08,491 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 354999818, now seen corresponding path program 52 times [2022-03-01 18:19:08,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:08,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427229080] [2022-03-01 18:19:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:08,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:08,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427229080] [2022-03-01 18:19:08,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427229080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:08,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068029426] [2022-03-01 18:19:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:08,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:08,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:08,728 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:19:08,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:08,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:09,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:09,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,234 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 46 treesize of output 34 [2022-03-01 18:19:09,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:09,406 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:09,406 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 58 [2022-03-01 18:19:09,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:09,461 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 17 [2022-03-01 18:19:09,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,518 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:09,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:09,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068029426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:09,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:09,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:09,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170237961] [2022-03-01 18:19:09,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:09,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:09,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:09,638 INFO L87 Difference]: Start difference. First operand 9171 states and 33732 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:19:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:10,540 INFO L93 Difference]: Finished difference Result 12482 states and 44736 transitions. [2022-03-01 18:19:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:19:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 28 [2022-03-01 18:19:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:10,570 INFO L225 Difference]: With dead ends: 12482 [2022-03-01 18:19:10,570 INFO L226 Difference]: Without dead ends: 12457 [2022-03-01 18:19:10,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:10,570 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 125 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:10,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 320 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 905 Invalid, 0 Unknown, 323 Unchecked, 0.4s Time] [2022-03-01 18:19:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2022-03-01 18:19:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 9292. [2022-03-01 18:19:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 3.669465073727263) internal successors, (34093), 9291 states have internal predecessors, (34093), 0 states have call successors, (0), 0 states 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 18:19:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 34093 transitions. [2022-03-01 18:19:10,750 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 34093 transitions. Word has length 28 [2022-03-01 18:19:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:10,751 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 34093 transitions. [2022-03-01 18:19:10,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 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 18:19:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 34093 transitions. [2022-03-01 18:19:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:10,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:10,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:10,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:10,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:10,971 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1702130574, now seen corresponding path program 53 times [2022-03-01 18:19:10,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:10,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458494468] [2022-03-01 18:19:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:11,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:11,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458494468] [2022-03-01 18:19:11,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458494468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:11,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134286078] [2022-03-01 18:19:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:11,219 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:11,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:19:11,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:19:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:11,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:11,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,647 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 49 treesize of output 37 [2022-03-01 18:19:11,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:11,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:11,799 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:11,799 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 58 [2022-03-01 18:19:11,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:11,859 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 17 [2022-03-01 18:19:11,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,909 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:11,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:11,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:12,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134286078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:12,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:12,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:12,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600863525] [2022-03-01 18:19:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:12,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:12,013 INFO L87 Difference]: Start difference. First operand 9292 states and 34093 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:19:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:12,788 INFO L93 Difference]: Finished difference Result 12589 states and 45041 transitions. [2022-03-01 18:19:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:19:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:19:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:12,867 INFO L225 Difference]: With dead ends: 12589 [2022-03-01 18:19:12,867 INFO L226 Difference]: Without dead ends: 12586 [2022-03-01 18:19:12,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:19:12,868 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:12,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 354 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 831 Invalid, 0 Unknown, 305 Unchecked, 0.4s Time] [2022-03-01 18:19:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2022-03-01 18:19:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 9334. [2022-03-01 18:19:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9334 states, 9333 states have (on average 3.6664523732990464) internal successors, (34219), 9333 states have internal predecessors, (34219), 0 states have call successors, (0), 0 states 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 18:19:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 34219 transitions. [2022-03-01 18:19:13,031 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 34219 transitions. Word has length 28 [2022-03-01 18:19:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:13,031 INFO L470 AbstractCegarLoop]: Abstraction has 9334 states and 34219 transitions. [2022-03-01 18:19:13,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:19:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 34219 transitions. [2022-03-01 18:19:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:13,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:13,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:13,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:13,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:13,249 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1584538738, now seen corresponding path program 54 times [2022-03-01 18:19:13,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:13,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060825804] [2022-03-01 18:19:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:13,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060825804] [2022-03-01 18:19:13,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060825804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:13,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747227931] [2022-03-01 18:19:13,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:13,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:13,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:13,433 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:13,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:19:13,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:19:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:13,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:13,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:13,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:13,923 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 49 treesize of output 37 [2022-03-01 18:19:13,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:19:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:14,069 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:14,069 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 58 [2022-03-01 18:19:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:14,110 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 17 [2022-03-01 18:19:14,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:14,152 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:14,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:14,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:14,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:14,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:14,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747227931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:14,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:14,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:14,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367046129] [2022-03-01 18:19:14,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:14,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:14,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:14,282 INFO L87 Difference]: Start difference. First operand 9334 states and 34219 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:15,313 INFO L93 Difference]: Finished difference Result 13985 states and 49679 transitions. [2022-03-01 18:19:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:19:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:19:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:15,348 INFO L225 Difference]: With dead ends: 13985 [2022-03-01 18:19:15,348 INFO L226 Difference]: Without dead ends: 13978 [2022-03-01 18:19:15,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:19:15,349 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:15,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 366 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 860 Invalid, 0 Unknown, 474 Unchecked, 0.3s Time] [2022-03-01 18:19:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2022-03-01 18:19:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 9414. [2022-03-01 18:19:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9414 states, 9413 states have (on average 3.662912992669712) internal successors, (34479), 9413 states have internal predecessors, (34479), 0 states have call successors, (0), 0 states 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 18:19:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9414 states to 9414 states and 34479 transitions. [2022-03-01 18:19:15,559 INFO L78 Accepts]: Start accepts. Automaton has 9414 states and 34479 transitions. Word has length 28 [2022-03-01 18:19:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:15,560 INFO L470 AbstractCegarLoop]: Abstraction has 9414 states and 34479 transitions. [2022-03-01 18:19:15,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 9414 states and 34479 transitions. [2022-03-01 18:19:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:15,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:15,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:15,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:15,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:15,826 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash 979658826, now seen corresponding path program 55 times [2022-03-01 18:19:15,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:15,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629252608] [2022-03-01 18:19:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:15,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:16,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629252608] [2022-03-01 18:19:16,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629252608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:16,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797695135] [2022-03-01 18:19:16,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:16,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:16,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:16,044 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:16,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:19:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:16,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:16,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,508 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 46 treesize of output 34 [2022-03-01 18:19:16,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:19:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:16,668 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:16,668 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 58 [2022-03-01 18:19:16,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:19:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,786 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:16,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:16,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797695135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:16,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:16,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:16,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345279018] [2022-03-01 18:19:16,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:16,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:16,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:16,890 INFO L87 Difference]: Start difference. First operand 9414 states and 34479 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:17,548 INFO L93 Difference]: Finished difference Result 12733 states and 45505 transitions. [2022-03-01 18:19:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:19:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:19:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:17,578 INFO L225 Difference]: With dead ends: 12733 [2022-03-01 18:19:17,578 INFO L226 Difference]: Without dead ends: 12622 [2022-03-01 18:19:17,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:17,578 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:17,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 273 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 757 Invalid, 0 Unknown, 359 Unchecked, 0.3s Time] [2022-03-01 18:19:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2022-03-01 18:19:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 9439. [2022-03-01 18:19:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9438 states have (on average 3.659991523627887) internal successors, (34543), 9438 states have internal predecessors, (34543), 0 states have call successors, (0), 0 states 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 18:19:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 34543 transitions. [2022-03-01 18:19:17,751 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 34543 transitions. Word has length 28 [2022-03-01 18:19:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:17,751 INFO L470 AbstractCegarLoop]: Abstraction has 9439 states and 34543 transitions. [2022-03-01 18:19:17,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 34543 transitions. [2022-03-01 18:19:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:17,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:17,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:17,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:17,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-01 18:19:17,983 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1048739190, now seen corresponding path program 56 times [2022-03-01 18:19:17,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:17,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481848742] [2022-03-01 18:19:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:17,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481848742] [2022-03-01 18:19:18,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481848742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248979891] [2022-03-01 18:19:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:18,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:18,268 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:18,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:19:18,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:18,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:18,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:19:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:18,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,609 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 46 treesize of output 34 [2022-03-01 18:19:18,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:19:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:18,784 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:18,784 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 58 [2022-03-01 18:19:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:18,830 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 34 treesize of output 18 [2022-03-01 18:19:18,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,878 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:18,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:18,931 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 23 treesize of output 6 [2022-03-01 18:19:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248979891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:18,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:18,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:19:18,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751370359] [2022-03-01 18:19:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:18,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:19:18,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:19:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:19:18,972 INFO L87 Difference]: Start difference. First operand 9439 states and 34543 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:19,910 INFO L93 Difference]: Finished difference Result 12769 states and 45644 transitions. [2022-03-01 18:19:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:19:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:19:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:19,941 INFO L225 Difference]: With dead ends: 12769 [2022-03-01 18:19:19,941 INFO L226 Difference]: Without dead ends: 12730 [2022-03-01 18:19:19,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:19,946 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:19,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 310 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1107 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2022-03-01 18:19:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12730 states. [2022-03-01 18:19:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12730 to 9472. [2022-03-01 18:19:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 9471 states have (on average 3.658747756308732) internal successors, (34652), 9471 states have internal predecessors, (34652), 0 states have call successors, (0), 0 states 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 18:19:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 34652 transitions. [2022-03-01 18:19:20,131 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 34652 transitions. Word has length 28 [2022-03-01 18:19:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:20,131 INFO L470 AbstractCegarLoop]: Abstraction has 9472 states and 34652 transitions. [2022-03-01 18:19:20,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 34652 transitions. [2022-03-01 18:19:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:20,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:20,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:20,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:19:20,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 18:19:20,364 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -108766266, now seen corresponding path program 57 times [2022-03-01 18:19:20,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:20,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823673945] [2022-03-01 18:19:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:20,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823673945] [2022-03-01 18:19:20,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823673945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:20,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57311177] [2022-03-01 18:19:20,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:20,648 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:20,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:19:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:20,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:19:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:21,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,155 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 42 treesize of output 30 [2022-03-01 18:19:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,159 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 32 treesize of output 20 [2022-03-01 18:19:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:21,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:21,378 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 63 treesize of output 80 [2022-03-01 18:19:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,512 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:21,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:21,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:21,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57311177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:21,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:21,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:19:21,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486188741] [2022-03-01 18:19:21,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:21,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:19:21,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:19:21,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:19:21,635 INFO L87 Difference]: Start difference. First operand 9472 states and 34652 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 18:19:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:24,712 INFO L93 Difference]: Finished difference Result 16278 states and 56064 transitions. [2022-03-01 18:19:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:19:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 28 [2022-03-01 18:19:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:24,751 INFO L225 Difference]: With dead ends: 16278 [2022-03-01 18:19:24,751 INFO L226 Difference]: Without dead ends: 16256 [2022-03-01 18:19:24,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=814, Invalid=4442, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:19:24,752 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:24,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 478 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1298 Invalid, 0 Unknown, 768 Unchecked, 0.7s Time] [2022-03-01 18:19:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2022-03-01 18:19:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 9906. [2022-03-01 18:19:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9905 states have (on average 3.652700656234225) internal successors, (36180), 9905 states have internal predecessors, (36180), 0 states have call successors, (0), 0 states 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 18:19:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 36180 transitions. [2022-03-01 18:19:24,979 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 36180 transitions. Word has length 28 [2022-03-01 18:19:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:24,979 INFO L470 AbstractCegarLoop]: Abstraction has 9906 states and 36180 transitions. [2022-03-01 18:19:24,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 18:19:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 36180 transitions. [2022-03-01 18:19:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:24,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:24,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:25,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 18:19:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 18:19:25,213 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1016834634, now seen corresponding path program 58 times [2022-03-01 18:19:25,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:25,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338828488] [2022-03-01 18:19:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:25,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:25,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338828488] [2022-03-01 18:19:25,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338828488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:25,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546474667] [2022-03-01 18:19:25,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:25,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:25,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:25,370 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:25,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:19:25,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:25,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:25,864 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 42 treesize of output 30 [2022-03-01 18:19:25,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:25,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:26,072 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:26,072 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 58 [2022-03-01 18:19:26,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:26,155 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 17 [2022-03-01 18:19:26,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,225 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:26,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:26,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:26,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:26,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546474667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:26,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:26,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:26,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058747141] [2022-03-01 18:19:26,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:26,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:26,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:26,367 INFO L87 Difference]: Start difference. First operand 9906 states and 36180 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:27,344 INFO L93 Difference]: Finished difference Result 14522 states and 51606 transitions. [2022-03-01 18:19:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:19:27,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:19:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:27,383 INFO L225 Difference]: With dead ends: 14522 [2022-03-01 18:19:27,383 INFO L226 Difference]: Without dead ends: 14513 [2022-03-01 18:19:27,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:19:27,383 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 149 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 365 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 917 Invalid, 0 Unknown, 551 Unchecked, 0.4s Time] [2022-03-01 18:19:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-03-01 18:19:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 9810. [2022-03-01 18:19:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9810 states, 9809 states have (on average 3.657457437047609) internal successors, (35876), 9809 states have internal predecessors, (35876), 0 states have call successors, (0), 0 states 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 18:19:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9810 states to 9810 states and 35876 transitions. [2022-03-01 18:19:27,653 INFO L78 Accepts]: Start accepts. Automaton has 9810 states and 35876 transitions. Word has length 28 [2022-03-01 18:19:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:27,653 INFO L470 AbstractCegarLoop]: Abstraction has 9810 states and 35876 transitions. [2022-03-01 18:19:27,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9810 states and 35876 transitions. [2022-03-01 18:19:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:27,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:27,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:27,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 18:19:27,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:27,888 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1891089294, now seen corresponding path program 59 times [2022-03-01 18:19:27,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:27,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875328978] [2022-03-01 18:19:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:28,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:28,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875328978] [2022-03-01 18:19:28,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875328978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:28,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824353067] [2022-03-01 18:19:28,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:28,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:28,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:28,089 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:28,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:19:28,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:19:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:28,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:28,563 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 24 treesize of output 20 [2022-03-01 18:19:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:28,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,566 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 34 treesize of output 22 [2022-03-01 18:19:28,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:28,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:28,724 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:28,724 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 58 [2022-03-01 18:19:28,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:28,764 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 17 [2022-03-01 18:19:28,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,804 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:28,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:28,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:28,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824353067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:28,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:28,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:28,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074005982] [2022-03-01 18:19:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:28,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:28,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:28,894 INFO L87 Difference]: Start difference. First operand 9810 states and 35876 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:29,461 INFO L93 Difference]: Finished difference Result 13105 states and 46880 transitions. [2022-03-01 18:19:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:19:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:19:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:29,497 INFO L225 Difference]: With dead ends: 13105 [2022-03-01 18:19:29,497 INFO L226 Difference]: Without dead ends: 13054 [2022-03-01 18:19:29,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:29,498 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:29,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 227 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 626 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2022-03-01 18:19:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2022-03-01 18:19:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 9842. [2022-03-01 18:19:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9842 states, 9841 states have (on average 3.6547098872065846) internal successors, (35966), 9841 states have internal predecessors, (35966), 0 states have call successors, (0), 0 states 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 18:19:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9842 states to 9842 states and 35966 transitions. [2022-03-01 18:19:29,701 INFO L78 Accepts]: Start accepts. Automaton has 9842 states and 35966 transitions. Word has length 28 [2022-03-01 18:19:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 9842 states and 35966 transitions. [2022-03-01 18:19:29,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:19:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9842 states and 35966 transitions. [2022-03-01 18:19:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:29,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:29,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:29,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:29,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:29,935 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash -137308722, now seen corresponding path program 60 times [2022-03-01 18:19:29,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:29,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598579625] [2022-03-01 18:19:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:30,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:30,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598579625] [2022-03-01 18:19:30,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598579625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:30,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348409750] [2022-03-01 18:19:30,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:30,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:30,178 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:19:30,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:19:30,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:19:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:30,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:30,692 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 24 treesize of output 20 [2022-03-01 18:19:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:30,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-01 18:19:30,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:19:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:30,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:30,993 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:30,993 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 58 [2022-03-01 18:19:31,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:31,058 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 34 treesize of output 18 [2022-03-01 18:19:31,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,117 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:31,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:31,175 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 23 treesize of output 6 [2022-03-01 18:19:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:31,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348409750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:31,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:31,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:19:31,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372703109] [2022-03-01 18:19:31,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:19:31,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:19:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:19:31,229 INFO L87 Difference]: Start difference. First operand 9842 states and 35966 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:19:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:33,221 INFO L93 Difference]: Finished difference Result 18659 states and 65671 transitions. [2022-03-01 18:19:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:19:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 28 [2022-03-01 18:19:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:33,270 INFO L225 Difference]: With dead ends: 18659 [2022-03-01 18:19:33,270 INFO L226 Difference]: Without dead ends: 18597 [2022-03-01 18:19:33,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:19:33,272 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:33,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 408 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1448 Invalid, 0 Unknown, 609 Unchecked, 0.7s Time] [2022-03-01 18:19:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18597 states. [2022-03-01 18:19:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18597 to 9919. [2022-03-01 18:19:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 9918 states have (on average 3.6527525710828797) internal successors, (36228), 9918 states have internal predecessors, (36228), 0 states have call successors, (0), 0 states 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 18:19:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 36228 transitions. [2022-03-01 18:19:33,519 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 36228 transitions. Word has length 28 [2022-03-01 18:19:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:33,519 INFO L470 AbstractCegarLoop]: Abstraction has 9919 states and 36228 transitions. [2022-03-01 18:19:33,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:19:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 36228 transitions. [2022-03-01 18:19:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:33,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:33,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:33,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 18:19:33,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 18:19:33,751 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2038960498, now seen corresponding path program 61 times [2022-03-01 18:19:33,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:33,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484430924] [2022-03-01 18:19:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:33,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:33,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484430924] [2022-03-01 18:19:33,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484430924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:33,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450581791] [2022-03-01 18:19:33,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:33,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:33,931 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:33,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:19:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:34,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:19:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,335 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 49 treesize of output 37 [2022-03-01 18:19:34,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:34,543 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:34,543 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 58 [2022-03-01 18:19:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:34,601 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 34 treesize of output 18 [2022-03-01 18:19:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,723 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:34,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:34,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:34,778 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 23 treesize of output 6 [2022-03-01 18:19:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:34,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450581791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:34,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:34,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:19:34,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786162704] [2022-03-01 18:19:34,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:34,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:19:34,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:19:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:19:34,840 INFO L87 Difference]: Start difference. First operand 9919 states and 36228 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:35,570 INFO L93 Difference]: Finished difference Result 13377 states and 47754 transitions. [2022-03-01 18:19:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:19:35,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:19:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:35,601 INFO L225 Difference]: With dead ends: 13377 [2022-03-01 18:19:35,602 INFO L226 Difference]: Without dead ends: 13362 [2022-03-01 18:19:35,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:19:35,602 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 159 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:35,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 299 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1020 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-03-01 18:19:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2022-03-01 18:19:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 9914. [2022-03-01 18:19:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states 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 18:19:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-03-01 18:19:35,786 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-03-01 18:19:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-03-01 18:19:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-03-01 18:19:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:35,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:35,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:35,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:36,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:36,020 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1391298934, now seen corresponding path program 62 times [2022-03-01 18:19:36,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:36,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980856966] [2022-03-01 18:19:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:36,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:36,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980856966] [2022-03-01 18:19:36,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980856966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:36,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856103148] [2022-03-01 18:19:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:36,185 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:36,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:19:36,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:36,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:36,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:36,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,576 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 49 treesize of output 37 [2022-03-01 18:19:36,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:36,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:36,818 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:36,819 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 58 [2022-03-01 18:19:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:36,899 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 34 treesize of output 18 [2022-03-01 18:19:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,970 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:36,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:37,058 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 23 treesize of output 6 [2022-03-01 18:19:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:37,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856103148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:37,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:37,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:19:37,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333921641] [2022-03-01 18:19:37,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:19:37,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:19:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:19:37,122 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:38,074 INFO L93 Difference]: Finished difference Result 13306 states and 47539 transitions. [2022-03-01 18:19:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:19:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:19:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:38,107 INFO L225 Difference]: With dead ends: 13306 [2022-03-01 18:19:38,107 INFO L226 Difference]: Without dead ends: 13299 [2022-03-01 18:19:38,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:19:38,107 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:38,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 966 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2022-03-01 18:19:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-03-01 18:19:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 9914. [2022-03-01 18:19:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states 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 18:19:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-03-01 18:19:38,413 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-03-01 18:19:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:38,413 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-03-01 18:19:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:19:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-03-01 18:19:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:38,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:38,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:38,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:38,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:38,643 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -356959350, now seen corresponding path program 63 times [2022-03-01 18:19:38,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:38,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565303845] [2022-03-01 18:19:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:38,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:38,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565303845] [2022-03-01 18:19:38,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565303845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:38,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986602067] [2022-03-01 18:19:38,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:38,848 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:38,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:19:38,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:19:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:39,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:39,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:39,482 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 39 treesize of output 57 [2022-03-01 18:19:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:39,498 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 103 treesize of output 99 [2022-03-01 18:19:39,503 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 73 treesize of output 61 [2022-03-01 18:19:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:40,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:40,826 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 56 treesize of output 89 [2022-03-01 18:19:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:41,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 6 [2022-03-01 18:19:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:41,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:41,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-01 18:19:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:42,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986602067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:42,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:42,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:19:42,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080506844] [2022-03-01 18:19:42,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:42,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:19:42,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:19:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:19:42,127 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:50,896 INFO L93 Difference]: Finished difference Result 20598 states and 71371 transitions. [2022-03-01 18:19:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-01 18:19:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:19:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:50,967 INFO L225 Difference]: With dead ends: 20598 [2022-03-01 18:19:50,967 INFO L226 Difference]: Without dead ends: 20571 [2022-03-01 18:19:50,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2179, Invalid=14591, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:19:50,970 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 391 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3613 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:50,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 591 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 879 Invalid, 0 Unknown, 3613 Unchecked, 0.5s Time] [2022-03-01 18:19:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-03-01 18:19:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10172. [2022-03-01 18:19:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10172 states, 10171 states have (on average 3.6481171959492675) internal successors, (37105), 10171 states have internal predecessors, (37105), 0 states have call successors, (0), 0 states 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 18:19:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 37105 transitions. [2022-03-01 18:19:51,372 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 37105 transitions. Word has length 28 [2022-03-01 18:19:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 37105 transitions. [2022-03-01 18:19:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 37105 transitions. [2022-03-01 18:19:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:51,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:51,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:51,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:51,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-01 18:19:51,608 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -49784884, now seen corresponding path program 64 times [2022-03-01 18:19:51,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:51,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895425368] [2022-03-01 18:19:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:51,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:51,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895425368] [2022-03-01 18:19:51,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895425368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:51,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968923613] [2022-03-01 18:19:51,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:51,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:51,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:51,868 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:51,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:19:51,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:19:51,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:52,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,431 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 42 treesize of output 30 [2022-03-01 18:19:52,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:19:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:52,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:52,606 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:52,606 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 58 [2022-03-01 18:19:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:52,677 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 17 [2022-03-01 18:19:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,736 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:52,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:19:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:52,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:52,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968923613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:52,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:52,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:19:52,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314229164] [2022-03-01 18:19:52,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:52,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:19:52,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:19:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:52,858 INFO L87 Difference]: Start difference. First operand 10172 states and 37105 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:19:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:53,319 INFO L93 Difference]: Finished difference Result 10593 states and 38328 transitions. [2022-03-01 18:19:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:19:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:19:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:53,351 INFO L225 Difference]: With dead ends: 10593 [2022-03-01 18:19:53,351 INFO L226 Difference]: Without dead ends: 10553 [2022-03-01 18:19:53,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:19:53,352 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:53,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-03-01 18:19:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10553 states. [2022-03-01 18:19:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10553 to 10210. [2022-03-01 18:19:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 3.6463904398080125) internal successors, (37226), 10209 states have internal predecessors, (37226), 0 states have call successors, (0), 0 states 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 18:19:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 37226 transitions. [2022-03-01 18:19:53,569 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 37226 transitions. Word has length 28 [2022-03-01 18:19:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:53,569 INFO L470 AbstractCegarLoop]: Abstraction has 10210 states and 37226 transitions. [2022-03-01 18:19:53,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:19:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 37226 transitions. [2022-03-01 18:19:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:53,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:53,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:53,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:53,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:53,815 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:53,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2306790, now seen corresponding path program 65 times [2022-03-01 18:19:53,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:53,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597552242] [2022-03-01 18:19:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:54,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:54,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597552242] [2022-03-01 18:19:54,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597552242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:54,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702730473] [2022-03-01 18:19:54,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:54,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:54,040 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:54,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:19:54,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:19:54,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:19:54,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:54,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:19:54,760 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 18:19:54,760 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 178 [2022-03-01 18:19:54,771 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 18:19:54,771 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 97 [2022-03-01 18:19:54,773 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 20 treesize of output 16 [2022-03-01 18:19:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:54,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:54,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:54,940 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:19:54,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-03-01 18:19:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:54,985 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 17 [2022-03-01 18:19:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:55,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:55,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:55,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:55,052 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 22 treesize of output 41 [2022-03-01 18:19:55,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:55,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:55,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:19:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:55,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702730473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:55,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:55,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:19:55,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291312482] [2022-03-01 18:19:55,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:55,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:19:55,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:19:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:19:55,127 INFO L87 Difference]: Start difference. First operand 10210 states and 37226 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:19:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:56,805 INFO L93 Difference]: Finished difference Result 14804 states and 52195 transitions. [2022-03-01 18:19:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:19:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 28 [2022-03-01 18:19:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:56,853 INFO L225 Difference]: With dead ends: 14804 [2022-03-01 18:19:56,853 INFO L226 Difference]: Without dead ends: 14752 [2022-03-01 18:19:56,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:19:56,854 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 206 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:56,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 378 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1409 Invalid, 0 Unknown, 388 Unchecked, 0.7s Time] [2022-03-01 18:19:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2022-03-01 18:19:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 10399. [2022-03-01 18:19:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 10398 states have (on average 3.6400269282554336) internal successors, (37849), 10398 states have internal predecessors, (37849), 0 states have call successors, (0), 0 states 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 18:19:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 37849 transitions. [2022-03-01 18:19:57,149 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 37849 transitions. Word has length 28 [2022-03-01 18:19:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:57,150 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 37849 transitions. [2022-03-01 18:19:57,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:19:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 37849 transitions. [2022-03-01 18:19:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:19:57,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:57,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:57,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 18:19:57,391 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1205094514, now seen corresponding path program 66 times [2022-03-01 18:19:57,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:57,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764774302] [2022-03-01 18:19:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:57,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:57,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764774302] [2022-03-01 18:19:57,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764774302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:57,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209717367] [2022-03-01 18:19:57,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:57,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:57,664 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:19:57,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:19:57,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:19:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:58,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:19:58,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:58,266 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 35 treesize of output 43 [2022-03-01 18:19:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:58,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:58,278 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 74 treesize of output 74 [2022-03-01 18:19:58,281 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 48 treesize of output 40 [2022-03-01 18:19:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:58,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:59,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:59,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-03-01 18:19:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:59,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:59,563 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 60 treesize of output 77 [2022-03-01 18:19:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:59,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209717367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:59,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:59,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:19:59,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680819144] [2022-03-01 18:19:59,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:59,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:19:59,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:19:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:19:59,741 INFO L87 Difference]: Start difference. First operand 10399 states and 37849 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:06,351 INFO L93 Difference]: Finished difference Result 24273 states and 83766 transitions. [2022-03-01 18:20:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-01 18:20:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:20:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:06,435 INFO L225 Difference]: With dead ends: 24273 [2022-03-01 18:20:06,435 INFO L226 Difference]: Without dead ends: 24230 [2022-03-01 18:20:06,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1801, Invalid=10855, Unknown=0, NotChecked=0, Total=12656 [2022-03-01 18:20:06,436 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 395 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2848 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:06,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 457 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 890 Invalid, 0 Unknown, 2848 Unchecked, 0.6s Time] [2022-03-01 18:20:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24230 states. [2022-03-01 18:20:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24230 to 10392. [2022-03-01 18:20:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 10391 states have (on average 3.6389182946780867) internal successors, (37812), 10391 states have internal predecessors, (37812), 0 states have call successors, (0), 0 states 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 18:20:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 37812 transitions. [2022-03-01 18:20:06,833 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 37812 transitions. Word has length 28 [2022-03-01 18:20:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:06,833 INFO L470 AbstractCegarLoop]: Abstraction has 10392 states and 37812 transitions. [2022-03-01 18:20:06,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 37812 transitions. [2022-03-01 18:20:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:06,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:06,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:06,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:07,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 18:20:07,079 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2027457418, now seen corresponding path program 67 times [2022-03-01 18:20:07,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:07,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395190000] [2022-03-01 18:20:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:07,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:07,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395190000] [2022-03-01 18:20:07,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395190000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:07,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70867369] [2022-03-01 18:20:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:07,270 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:07,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:20:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:07,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,592 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 46 treesize of output 34 [2022-03-01 18:20:07,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:20:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:07,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:07,731 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:07,732 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 58 [2022-03-01 18:20:07,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,775 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 34 treesize of output 18 [2022-03-01 18:20:07,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,819 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:07,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,863 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 23 treesize of output 6 [2022-03-01 18:20:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:07,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70867369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:07,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:07,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:07,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249183021] [2022-03-01 18:20:07,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:07,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:07,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:07,907 INFO L87 Difference]: Start difference. First operand 10392 states and 37812 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:08,655 INFO L93 Difference]: Finished difference Result 15139 states and 53769 transitions. [2022-03-01 18:20:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:20:08,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:08,704 INFO L225 Difference]: With dead ends: 15139 [2022-03-01 18:20:08,704 INFO L226 Difference]: Without dead ends: 15122 [2022-03-01 18:20:08,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:20:08,705 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:08,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 311 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 695 Invalid, 0 Unknown, 276 Unchecked, 0.3s Time] [2022-03-01 18:20:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15122 states. [2022-03-01 18:20:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15122 to 10411. [2022-03-01 18:20:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 3.6359269932756964) internal successors, (37850), 10410 states have internal predecessors, (37850), 0 states have call successors, (0), 0 states 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 18:20:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 37850 transitions. [2022-03-01 18:20:09,025 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 37850 transitions. Word has length 28 [2022-03-01 18:20:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:09,025 INFO L470 AbstractCegarLoop]: Abstraction has 10411 states and 37850 transitions. [2022-03-01 18:20:09,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 37850 transitions. [2022-03-01 18:20:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:09,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:09,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:09,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:09,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:09,270 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:09,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1960335412, now seen corresponding path program 68 times [2022-03-01 18:20:09,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:09,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914484237] [2022-03-01 18:20:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:09,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:09,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:09,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914484237] [2022-03-01 18:20:09,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914484237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:09,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671032450] [2022-03-01 18:20:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:20:09,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:09,472 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:09,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:20:09,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:20:09,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:09,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:09,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-03-01 18:20:09,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:20:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:09,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:10,148 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:10,148 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 58 [2022-03-01 18:20:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,192 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 17 [2022-03-01 18:20:10,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,239 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:10,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:10,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671032450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:10,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:10,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:20:10,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171846802] [2022-03-01 18:20:10,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:20:10,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:20:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:20:10,338 INFO L87 Difference]: Start difference. First operand 10411 states and 37850 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:20:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:11,003 INFO L93 Difference]: Finished difference Result 14636 states and 51837 transitions. [2022-03-01 18:20:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:20:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:20:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:11,047 INFO L225 Difference]: With dead ends: 14636 [2022-03-01 18:20:11,047 INFO L226 Difference]: Without dead ends: 14600 [2022-03-01 18:20:11,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:20:11,048 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:11,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 316 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 736 Invalid, 0 Unknown, 424 Unchecked, 0.3s Time] [2022-03-01 18:20:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14600 states. [2022-03-01 18:20:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14600 to 10391. [2022-03-01 18:20:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10391 states, 10390 states have (on average 3.63888354186718) internal successors, (37808), 10390 states have internal predecessors, (37808), 0 states have call successors, (0), 0 states 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 18:20:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10391 states to 10391 states and 37808 transitions. [2022-03-01 18:20:11,283 INFO L78 Accepts]: Start accepts. Automaton has 10391 states and 37808 transitions. Word has length 28 [2022-03-01 18:20:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 10391 states and 37808 transitions. [2022-03-01 18:20:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:20:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10391 states and 37808 transitions. [2022-03-01 18:20:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:11,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:11,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:11,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:11,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:11,517 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1530883958, now seen corresponding path program 69 times [2022-03-01 18:20:11,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:11,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937135320] [2022-03-01 18:20:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:11,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:11,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937135320] [2022-03-01 18:20:11,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937135320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:11,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453509846] [2022-03-01 18:20:11,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:11,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:11,736 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:11,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:20:11,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:20:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:11,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:20:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:12,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:12,276 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 39 treesize of output 29 [2022-03-01 18:20:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:12,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2022-03-01 18:20:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:12,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:12,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:12,674 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 64 treesize of output 59 [2022-03-01 18:20:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:12,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-03-01 18:20:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:12,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453509846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:12,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:12,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-01 18:20:12,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344179518] [2022-03-01 18:20:12,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:12,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:20:12,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:20:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:20:12,876 INFO L87 Difference]: Start difference. First operand 10391 states and 37808 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 18:20:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:18,907 INFO L93 Difference]: Finished difference Result 25149 states and 87653 transitions. [2022-03-01 18:20:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:20:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 28 [2022-03-01 18:20:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:19,003 INFO L225 Difference]: With dead ends: 25149 [2022-03-01 18:20:19,003 INFO L226 Difference]: Without dead ends: 25120 [2022-03-01 18:20:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1856, Invalid=11484, Unknown=0, NotChecked=0, Total=13340 [2022-03-01 18:20:19,004 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 550 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1903 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:19,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 573 Invalid, 3092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1041 Invalid, 0 Unknown, 1903 Unchecked, 0.7s Time] [2022-03-01 18:20:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25120 states. [2022-03-01 18:20:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25120 to 10527. [2022-03-01 18:20:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10527 states, 10526 states have (on average 3.6303439103173094) internal successors, (38213), 10526 states have internal predecessors, (38213), 0 states have call successors, (0), 0 states 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 18:20:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10527 states to 10527 states and 38213 transitions. [2022-03-01 18:20:19,413 INFO L78 Accepts]: Start accepts. Automaton has 10527 states and 38213 transitions. Word has length 28 [2022-03-01 18:20:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 10527 states and 38213 transitions. [2022-03-01 18:20:19,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 18:20:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10527 states and 38213 transitions. [2022-03-01 18:20:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:19,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:19,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:19,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:19,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 18:20:19,659 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:19,659 INFO L85 PathProgramCache]: Analyzing trace with hash 824544782, now seen corresponding path program 70 times [2022-03-01 18:20:19,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:19,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354543967] [2022-03-01 18:20:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:19,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:19,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354543967] [2022-03-01 18:20:19,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354543967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:19,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682171027] [2022-03-01 18:20:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:19,892 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:20:19,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:19,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:19,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:19,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:20,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:20,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:20:20,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:20:20,326 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 18:20:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:20,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:20,535 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:20,535 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-03-01 18:20:20,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:20,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:20,605 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 17 [2022-03-01 18:20:20,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:20,679 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:20,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:20,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:20,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682171027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:20,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:20,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:20,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342922803] [2022-03-01 18:20:20,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:20,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:20,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:20,909 INFO L87 Difference]: Start difference. First operand 10527 states and 38213 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 18:20:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:22,774 INFO L93 Difference]: Finished difference Result 16564 states and 58524 transitions. [2022-03-01 18:20:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:20:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 28 [2022-03-01 18:20:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:22,829 INFO L225 Difference]: With dead ends: 16564 [2022-03-01 18:20:22,830 INFO L226 Difference]: Without dead ends: 16549 [2022-03-01 18:20:22,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:20:22,830 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 163 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:22,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 314 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:20:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16549 states. [2022-03-01 18:20:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16549 to 10528. [2022-03-01 18:20:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 10527 states have (on average 3.631613945093569) internal successors, (38230), 10527 states have internal predecessors, (38230), 0 states have call successors, (0), 0 states 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 18:20:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 38230 transitions. [2022-03-01 18:20:23,161 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 38230 transitions. Word has length 28 [2022-03-01 18:20:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:23,161 INFO L470 AbstractCegarLoop]: Abstraction has 10528 states and 38230 transitions. [2022-03-01 18:20:23,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 18:20:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 38230 transitions. [2022-03-01 18:20:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:23,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:23,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:23,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:23,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 18:20:23,429 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -228189426, now seen corresponding path program 71 times [2022-03-01 18:20:23,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:23,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292717385] [2022-03-01 18:20:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:23,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:23,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292717385] [2022-03-01 18:20:23,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292717385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:23,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298260083] [2022-03-01 18:20:23,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:23,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:23,570 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:23,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:20:23,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:20:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:23,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:23,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:23,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-01 18:20:23,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:20:23,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:20:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:23,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:24,078 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:24,078 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 58 [2022-03-01 18:20:24,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:24,128 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 17 [2022-03-01 18:20:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,179 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:24,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:24,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:24,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298260083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:24,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:24,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:24,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370091471] [2022-03-01 18:20:24,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:24,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:24,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:24,280 INFO L87 Difference]: Start difference. First operand 10528 states and 38230 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:24,841 INFO L93 Difference]: Finished difference Result 10805 states and 39021 transitions. [2022-03-01 18:20:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:20:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:24,867 INFO L225 Difference]: With dead ends: 10805 [2022-03-01 18:20:24,868 INFO L226 Difference]: Without dead ends: 10728 [2022-03-01 18:20:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:20:24,868 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:24,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 214 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:20:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-03-01 18:20:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10558. [2022-03-01 18:20:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10558 states, 10557 states have (on average 3.63010324902908) internal successors, (38323), 10557 states have internal predecessors, (38323), 0 states have call successors, (0), 0 states 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 18:20:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 38323 transitions. [2022-03-01 18:20:25,083 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 38323 transitions. Word has length 28 [2022-03-01 18:20:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:25,083 INFO L470 AbstractCegarLoop]: Abstraction has 10558 states and 38323 transitions. [2022-03-01 18:20:25,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 38323 transitions. [2022-03-01 18:20:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:25,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:25,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:25,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:25,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:25,326 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 839685138, now seen corresponding path program 72 times [2022-03-01 18:20:25,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:25,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946778012] [2022-03-01 18:20:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:25,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:25,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946778012] [2022-03-01 18:20:25,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946778012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:25,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120868631] [2022-03-01 18:20:25,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:25,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:25,601 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:25,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:20:25,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:20:25,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:25,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:25,934 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 24 treesize of output 20 [2022-03-01 18:20:25,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:20:25,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-01 18:20:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:26,144 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:26,145 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 58 [2022-03-01 18:20:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:26,203 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 17 [2022-03-01 18:20:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:26,261 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:26,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:26,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:26,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120868631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:26,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:26,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:26,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013308119] [2022-03-01 18:20:26,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:26,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:26,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:26,384 INFO L87 Difference]: Start difference. First operand 10558 states and 38323 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:27,452 INFO L93 Difference]: Finished difference Result 14029 states and 50015 transitions. [2022-03-01 18:20:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:20:27,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:20:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:27,487 INFO L225 Difference]: With dead ends: 14029 [2022-03-01 18:20:27,487 INFO L226 Difference]: Without dead ends: 14001 [2022-03-01 18:20:27,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:20:27,487 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 108 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:27,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 313 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:20:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14001 states. [2022-03-01 18:20:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14001 to 10577. [2022-03-01 18:20:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10577 states, 10576 states have (on average 3.63142965204236) internal successors, (38406), 10576 states have internal predecessors, (38406), 0 states have call successors, (0), 0 states 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 18:20:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 38406 transitions. [2022-03-01 18:20:27,707 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 38406 transitions. Word has length 28 [2022-03-01 18:20:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 10577 states and 38406 transitions. [2022-03-01 18:20:27,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 38406 transitions. [2022-03-01 18:20:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:27,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:27,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:27,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 18:20:27,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:27,945 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1348931822, now seen corresponding path program 73 times [2022-03-01 18:20:27,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:27,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226783680] [2022-03-01 18:20:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:28,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:28,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226783680] [2022-03-01 18:20:28,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226783680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:28,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062766051] [2022-03-01 18:20:28,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:28,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:28,197 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:20:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:28,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:28,501 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 24 treesize of output 20 [2022-03-01 18:20:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,541 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 39 treesize of output 27 [2022-03-01 18:20:28,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:20:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:28,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:28,790 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:28,791 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 34 treesize of output 59 [2022-03-01 18:20:28,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:28,852 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 17 [2022-03-01 18:20:28,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,912 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:28,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:28,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:28,985 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 23 treesize of output 7 [2022-03-01 18:20:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:29,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062766051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:29,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:29,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:29,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325091272] [2022-03-01 18:20:29,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:29,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:29,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:29,045 INFO L87 Difference]: Start difference. First operand 10577 states and 38406 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:29,492 INFO L93 Difference]: Finished difference Result 10800 states and 39061 transitions. [2022-03-01 18:20:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:20:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:29,579 INFO L225 Difference]: With dead ends: 10800 [2022-03-01 18:20:29,579 INFO L226 Difference]: Without dead ends: 10775 [2022-03-01 18:20:29,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:20:29,579 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:29,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:20:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-03-01 18:20:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 10612. [2022-03-01 18:20:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 3.6314202242955425) internal successors, (38533), 10611 states have internal predecessors, (38533), 0 states have call successors, (0), 0 states 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 18:20:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 38533 transitions. [2022-03-01 18:20:29,750 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 38533 transitions. Word has length 28 [2022-03-01 18:20:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:29,751 INFO L470 AbstractCegarLoop]: Abstraction has 10612 states and 38533 transitions. [2022-03-01 18:20:29,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 38533 transitions. [2022-03-01 18:20:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:29,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:29,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:29,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 18:20:29,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-01 18:20:29,972 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1958543862, now seen corresponding path program 74 times [2022-03-01 18:20:29,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:29,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328132620] [2022-03-01 18:20:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:30,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328132620] [2022-03-01 18:20:30,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328132620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:30,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644997636] [2022-03-01 18:20:30,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:20:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:30,188 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:30,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:20:30,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:20:30,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:30,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:30,487 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 31 treesize of output 27 [2022-03-01 18:20:30,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:20:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,548 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 36 treesize of output 24 [2022-03-01 18:20:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:30,750 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:30,751 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 34 treesize of output 59 [2022-03-01 18:20:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:30,802 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 17 [2022-03-01 18:20:30,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,860 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:30,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:30,911 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 23 treesize of output 7 [2022-03-01 18:20:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644997636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:30,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:30,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:30,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654500984] [2022-03-01 18:20:30,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:30,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:30,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:30,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:30,966 INFO L87 Difference]: Start difference. First operand 10612 states and 38533 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:31,502 INFO L93 Difference]: Finished difference Result 10784 states and 39039 transitions. [2022-03-01 18:20:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:20:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:20:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:31,527 INFO L225 Difference]: With dead ends: 10784 [2022-03-01 18:20:31,527 INFO L226 Difference]: Without dead ends: 10769 [2022-03-01 18:20:31,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:20:31,528 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:31,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 192 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:20:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2022-03-01 18:20:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 10619. [2022-03-01 18:20:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.631851572800904) internal successors, (38563), 10618 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states 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 18:20:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 38563 transitions. [2022-03-01 18:20:31,710 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 38563 transitions. Word has length 28 [2022-03-01 18:20:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 10619 states and 38563 transitions. [2022-03-01 18:20:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 38563 transitions. [2022-03-01 18:20:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:31,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:31,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:31,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 18:20:31,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:31,942 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1830535506, now seen corresponding path program 75 times [2022-03-01 18:20:31,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:31,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832701307] [2022-03-01 18:20:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:32,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:32,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832701307] [2022-03-01 18:20:32,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832701307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:32,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397811483] [2022-03-01 18:20:32,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:32,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:32,174 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:32,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:20:32,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:20:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:32,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:20:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:32,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:32,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:32,900 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 46 treesize of output 56 [2022-03-01 18:20:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:32,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:32,912 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 82 treesize of output 82 [2022-03-01 18:20:32,915 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 52 treesize of output 44 [2022-03-01 18:20:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:33,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:33,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:33,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:33,612 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 60 treesize of output 77 [2022-03-01 18:20:33,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:33,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:33,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-03-01 18:20:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:34,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397811483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:34,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:34,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-01 18:20:34,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419538032] [2022-03-01 18:20:34,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:34,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:20:34,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:20:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:20:34,122 INFO L87 Difference]: Start difference. First operand 10619 states and 38563 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:20:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:36,692 INFO L93 Difference]: Finished difference Result 18254 states and 64192 transitions. [2022-03-01 18:20:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:20:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 28 [2022-03-01 18:20:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:36,738 INFO L225 Difference]: With dead ends: 18254 [2022-03-01 18:20:36,738 INFO L226 Difference]: Without dead ends: 18126 [2022-03-01 18:20:36,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=557, Invalid=5295, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:20:36,739 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 238 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:36,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 436 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 645 Invalid, 0 Unknown, 1552 Unchecked, 0.3s Time] [2022-03-01 18:20:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2022-03-01 18:20:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 10703. [2022-03-01 18:20:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10703 states, 10702 states have (on average 3.6252102410764344) internal successors, (38797), 10702 states have internal predecessors, (38797), 0 states have call successors, (0), 0 states 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 18:20:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 38797 transitions. [2022-03-01 18:20:37,003 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 38797 transitions. Word has length 28 [2022-03-01 18:20:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:37,003 INFO L470 AbstractCegarLoop]: Abstraction has 10703 states and 38797 transitions. [2022-03-01 18:20:37,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:20:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 38797 transitions. [2022-03-01 18:20:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:37,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:37,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:37,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:37,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:37,235 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:37,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1712762762, now seen corresponding path program 76 times [2022-03-01 18:20:37,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:37,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899975230] [2022-03-01 18:20:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:37,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:37,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899975230] [2022-03-01 18:20:37,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899975230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:37,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342048913] [2022-03-01 18:20:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:37,513 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:20:37,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:37,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:37,990 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 49 treesize of output 37 [2022-03-01 18:20:37,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:20:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:38,186 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:38,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-01 18:20:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:38,247 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 34 treesize of output 18 [2022-03-01 18:20:38,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:38,313 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:38,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:38,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:38,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:38,378 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 23 treesize of output 6 [2022-03-01 18:20:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:38,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342048913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:38,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:38,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:38,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707925383] [2022-03-01 18:20:38,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:38,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:38,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:38,420 INFO L87 Difference]: Start difference. First operand 10703 states and 38797 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:39,290 INFO L93 Difference]: Finished difference Result 15689 states and 55485 transitions. [2022-03-01 18:20:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:20:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:39,331 INFO L225 Difference]: With dead ends: 15689 [2022-03-01 18:20:39,331 INFO L226 Difference]: Without dead ends: 15614 [2022-03-01 18:20:39,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:20:39,332 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:39,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 339 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1001 Invalid, 0 Unknown, 395 Unchecked, 0.4s Time] [2022-03-01 18:20:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15614 states. [2022-03-01 18:20:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15614 to 10735. [2022-03-01 18:20:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10735 states, 10734 states have (on average 3.6251164523942614) internal successors, (38912), 10734 states have internal predecessors, (38912), 0 states have call successors, (0), 0 states 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 18:20:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10735 states to 10735 states and 38912 transitions. [2022-03-01 18:20:39,574 INFO L78 Accepts]: Start accepts. Automaton has 10735 states and 38912 transitions. Word has length 28 [2022-03-01 18:20:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:39,575 INFO L470 AbstractCegarLoop]: Abstraction has 10735 states and 38912 transitions. [2022-03-01 18:20:39,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10735 states and 38912 transitions. [2022-03-01 18:20:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:39,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:39,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:39,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:39,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:39,827 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash 436033774, now seen corresponding path program 77 times [2022-03-01 18:20:39,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:39,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247474355] [2022-03-01 18:20:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:39,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:39,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247474355] [2022-03-01 18:20:39,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247474355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:39,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253361796] [2022-03-01 18:20:39,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:39,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:39,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:39,982 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:39,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 18:20:40,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:20:40,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:40,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:40,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,440 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 46 treesize of output 34 [2022-03-01 18:20:40,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:20:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:40,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:40,660 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:40,661 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 58 [2022-03-01 18:20:40,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:40,732 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 34 treesize of output 18 [2022-03-01 18:20:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,798 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:40,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:40,914 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 23 treesize of output 6 [2022-03-01 18:20:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:40,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253361796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:40,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:40,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:40,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038710641] [2022-03-01 18:20:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:40,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:40,971 INFO L87 Difference]: Start difference. First operand 10735 states and 38912 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:41,761 INFO L93 Difference]: Finished difference Result 14307 states and 50819 transitions. [2022-03-01 18:20:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:20:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:41,797 INFO L225 Difference]: With dead ends: 14307 [2022-03-01 18:20:41,797 INFO L226 Difference]: Without dead ends: 14169 [2022-03-01 18:20:41,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:20:41,798 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 165 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:41,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 248 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 811 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2022-03-01 18:20:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14169 states. [2022-03-01 18:20:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14169 to 10786. [2022-03-01 18:20:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10786 states, 10785 states have (on average 3.6205841446453406) internal successors, (39048), 10785 states have internal predecessors, (39048), 0 states have call successors, (0), 0 states 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 18:20:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10786 states to 10786 states and 39048 transitions. [2022-03-01 18:20:42,005 INFO L78 Accepts]: Start accepts. Automaton has 10786 states and 39048 transitions. Word has length 28 [2022-03-01 18:20:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:42,005 INFO L470 AbstractCegarLoop]: Abstraction has 10786 states and 39048 transitions. [2022-03-01 18:20:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 10786 states and 39048 transitions. [2022-03-01 18:20:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:42,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:42,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:42,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:42,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-01 18:20:42,227 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1294735958, now seen corresponding path program 78 times [2022-03-01 18:20:42,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:42,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706808229] [2022-03-01 18:20:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:42,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:42,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706808229] [2022-03-01 18:20:42,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706808229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:42,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041526968] [2022-03-01 18:20:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:42,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:42,443 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 18:20:42,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:20:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:20:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:42,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:42,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:42,917 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 46 treesize of output 50 [2022-03-01 18:20:42,924 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 69 treesize of output 59 [2022-03-01 18:20:43,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:43,042 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 58 treesize of output 58 [2022-03-01 18:20:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:43,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:43,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:43,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:43,366 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 60 treesize of output 77 [2022-03-01 18:20:43,545 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:20:43,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-03-01 18:20:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:43,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041526968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:43,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:43,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:20:43,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023473791] [2022-03-01 18:20:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:43,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:20:43,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:20:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:20:43,941 INFO L87 Difference]: Start difference. First operand 10786 states and 39048 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:20:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:47,573 INFO L93 Difference]: Finished difference Result 22215 states and 76572 transitions. [2022-03-01 18:20:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:20:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 28 [2022-03-01 18:20:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:47,631 INFO L225 Difference]: With dead ends: 22215 [2022-03-01 18:20:47,631 INFO L226 Difference]: Without dead ends: 22047 [2022-03-01 18:20:47,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1143, Invalid=7599, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 18:20:47,632 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 499 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1524 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:47,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 501 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1384 Invalid, 0 Unknown, 1524 Unchecked, 0.8s Time] [2022-03-01 18:20:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22047 states. [2022-03-01 18:20:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22047 to 10926. [2022-03-01 18:20:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10926 states, 10925 states have (on average 3.6135469107551486) internal successors, (39478), 10925 states have internal predecessors, (39478), 0 states have call successors, (0), 0 states 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 18:20:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10926 states to 10926 states and 39478 transitions. [2022-03-01 18:20:47,935 INFO L78 Accepts]: Start accepts. Automaton has 10926 states and 39478 transitions. Word has length 28 [2022-03-01 18:20:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 10926 states and 39478 transitions. [2022-03-01 18:20:47,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 18:20:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10926 states and 39478 transitions. [2022-03-01 18:20:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:47,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:47,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:47,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 18:20:48,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-01 18:20:48,157 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1101740526, now seen corresponding path program 79 times [2022-03-01 18:20:48,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:48,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642689383] [2022-03-01 18:20:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:48,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:48,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642689383] [2022-03-01 18:20:48,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642689383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:48,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413021166] [2022-03-01 18:20:48,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:48,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:48,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:48,373 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:48,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 18:20:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:48,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:48,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:48,734 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 46 treesize of output 34 [2022-03-01 18:20:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:20:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:48,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:49,019 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:49,020 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 58 [2022-03-01 18:20:49,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:49,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:49,090 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 34 treesize of output 18 [2022-03-01 18:20:49,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:49,157 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:49,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:49,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:49,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:49,218 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 23 treesize of output 6 [2022-03-01 18:20:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:49,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413021166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:49,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:49,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:49,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944215594] [2022-03-01 18:20:49,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:49,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:49,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:49,254 INFO L87 Difference]: Start difference. First operand 10926 states and 39478 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:49,901 INFO L93 Difference]: Finished difference Result 14564 states and 51592 transitions. [2022-03-01 18:20:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:20:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:20:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:49,941 INFO L225 Difference]: With dead ends: 14564 [2022-03-01 18:20:49,941 INFO L226 Difference]: Without dead ends: 14538 [2022-03-01 18:20:49,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:20:49,942 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:49,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 303 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1174 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-03-01 18:20:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2022-03-01 18:20:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 10947. [2022-03-01 18:20:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 3.613374748766673) internal successors, (39552), 10946 states have internal predecessors, (39552), 0 states have call successors, (0), 0 states 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 18:20:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 39552 transitions. [2022-03-01 18:20:50,163 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 39552 transitions. Word has length 28 [2022-03-01 18:20:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:50,163 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 39552 transitions. [2022-03-01 18:20:50,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:20:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 39552 transitions. [2022-03-01 18:20:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:50,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:50,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:50,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:50,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 18:20:50,395 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 715331910, now seen corresponding path program 80 times [2022-03-01 18:20:50,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:50,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65633783] [2022-03-01 18:20:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:50,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:50,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65633783] [2022-03-01 18:20:50,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65633783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:50,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825211238] [2022-03-01 18:20:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:20:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:50,674 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:50,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 18:20:50,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:20:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:20:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:50,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:51,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:51,362 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 49 treesize of output 37 [2022-03-01 18:20:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:51,365 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 32 treesize of output 20 [2022-03-01 18:20:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:51,656 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:20:51,656 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 63 treesize of output 88 [2022-03-01 18:20:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:52,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:52,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:52,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825211238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:52,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:52,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 18:20:52,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36186068] [2022-03-01 18:20:52,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:52,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:20:52,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:20:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:20:52,260 INFO L87 Difference]: Start difference. First operand 10947 states and 39552 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:53,303 INFO L93 Difference]: Finished difference Result 15320 states and 54028 transitions. [2022-03-01 18:20:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:20:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:20:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:53,343 INFO L225 Difference]: With dead ends: 15320 [2022-03-01 18:20:53,343 INFO L226 Difference]: Without dead ends: 15274 [2022-03-01 18:20:53,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:20:53,343 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:53,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 223 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 393 Invalid, 0 Unknown, 609 Unchecked, 0.2s Time] [2022-03-01 18:20:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15274 states. [2022-03-01 18:20:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15274 to 11320. [2022-03-01 18:20:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11319 states have (on average 3.610301263362488) internal successors, (40865), 11319 states have internal predecessors, (40865), 0 states have call successors, (0), 0 states 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 18:20:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 40865 transitions. [2022-03-01 18:20:53,574 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 40865 transitions. Word has length 28 [2022-03-01 18:20:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:53,575 INFO L470 AbstractCegarLoop]: Abstraction has 11320 states and 40865 transitions. [2022-03-01 18:20:53,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 40865 transitions. [2022-03-01 18:20:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:53,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:53,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:53,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:53,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 18:20:53,810 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash -260986934, now seen corresponding path program 81 times [2022-03-01 18:20:53,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:53,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128745869] [2022-03-01 18:20:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:53,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:54,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:54,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128745869] [2022-03-01 18:20:54,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128745869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:54,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547630322] [2022-03-01 18:20:54,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:54,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:54,056 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 18:20:54,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:20:54,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:54,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:20:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:54,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:20:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:54,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:54,606 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 46 treesize of output 52 [2022-03-01 18:20:54,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:54,615 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 91 treesize of output 93 [2022-03-01 18:20:54,618 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 63 treesize of output 53 [2022-03-01 18:20:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:55,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:55,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:55,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:55,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-01 18:20:55,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:55,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:55,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-03-01 18:20:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:55,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547630322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:55,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:55,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-01 18:20:55,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682757040] [2022-03-01 18:20:55,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:55,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:20:55,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:20:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:20:55,561 INFO L87 Difference]: Start difference. First operand 11320 states and 40865 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:20:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:57,849 INFO L93 Difference]: Finished difference Result 20879 states and 72924 transitions. [2022-03-01 18:20:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:20:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 28 [2022-03-01 18:20:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:57,903 INFO L225 Difference]: With dead ends: 20879 [2022-03-01 18:20:57,903 INFO L226 Difference]: Without dead ends: 20796 [2022-03-01 18:20:57,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=734, Invalid=6072, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:20:57,904 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 284 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:57,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 564 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 835 Invalid, 0 Unknown, 1580 Unchecked, 0.3s Time] [2022-03-01 18:20:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20796 states. [2022-03-01 18:20:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20796 to 11364. [2022-03-01 18:20:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.6121622810877407) internal successors, (41045), 11363 states have internal predecessors, (41045), 0 states have call successors, (0), 0 states 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 18:20:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 41045 transitions. [2022-03-01 18:20:58,200 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 41045 transitions. Word has length 28 [2022-03-01 18:20:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:58,200 INFO L470 AbstractCegarLoop]: Abstraction has 11364 states and 41045 transitions. [2022-03-01 18:20:58,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 18:20:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 41045 transitions. [2022-03-01 18:20:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:20:58,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:58,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:58,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:58,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:58,423 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1267822518, now seen corresponding path program 82 times [2022-03-01 18:20:58,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:58,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648950810] [2022-03-01 18:20:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:58,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:58,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648950810] [2022-03-01 18:20:58,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648950810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:58,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127682693] [2022-03-01 18:20:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:58,626 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:58,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 18:20:58,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:20:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:58,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:20:59,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:20:59,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-01 18:20:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:59,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:59,158 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:20:59,158 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 58 [2022-03-01 18:20:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:59,205 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 17 [2022-03-01 18:20:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:59,249 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:20:59,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:20:59,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:59,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:59,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:59,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127682693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:59,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:59,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:20:59,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349759214] [2022-03-01 18:20:59,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:59,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:20:59,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:20:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:20:59,318 INFO L87 Difference]: Start difference. First operand 11364 states and 41045 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 18:21:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:00,303 INFO L93 Difference]: Finished difference Result 16550 states and 58539 transitions. [2022-03-01 18:21:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:21:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 28 [2022-03-01 18:21:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:00,345 INFO L225 Difference]: With dead ends: 16550 [2022-03-01 18:21:00,345 INFO L226 Difference]: Without dead ends: 16496 [2022-03-01 18:21:00,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:21:00,346 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 130 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:00,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 220 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:21:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16496 states. [2022-03-01 18:21:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16496 to 11409. [2022-03-01 18:21:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 3.612201963534362) internal successors, (41208), 11408 states have internal predecessors, (41208), 0 states have call successors, (0), 0 states 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 18:21:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 41208 transitions. [2022-03-01 18:21:00,610 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 41208 transitions. Word has length 28 [2022-03-01 18:21:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:00,610 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 41208 transitions. [2022-03-01 18:21:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 18:21:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 41208 transitions. [2022-03-01 18:21:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:00,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:00,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:00,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:00,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:00,850 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1136858162, now seen corresponding path program 83 times [2022-03-01 18:21:00,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:00,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707565341] [2022-03-01 18:21:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:00,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:01,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:01,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707565341] [2022-03-01 18:21:01,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707565341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:01,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630993259] [2022-03-01 18:21:01,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:01,086 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:01,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 18:21:01,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:21:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:21:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:01,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:01,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:21:01,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:21:01,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:21:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:01,603 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:01,603 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 58 [2022-03-01 18:21:01,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:01,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:01,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:21:01,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:01,740 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:01,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:01,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:01,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630993259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:01,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:01,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:01,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902150954] [2022-03-01 18:21:01,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:01,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:01,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:01,863 INFO L87 Difference]: Start difference. First operand 11409 states and 41208 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:02,734 INFO L93 Difference]: Finished difference Result 15005 states and 53333 transitions. [2022-03-01 18:21:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:21:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:21:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:02,772 INFO L225 Difference]: With dead ends: 15005 [2022-03-01 18:21:02,772 INFO L226 Difference]: Without dead ends: 14990 [2022-03-01 18:21:02,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:21:02,772 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:02,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 265 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1136 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-03-01 18:21:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14990 states. [2022-03-01 18:21:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14990 to 11412. [2022-03-01 18:21:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11412 states, 11411 states have (on average 3.6137937078257822) internal successors, (41237), 11411 states have internal predecessors, (41237), 0 states have call successors, (0), 0 states 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 18:21:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11412 states to 11412 states and 41237 transitions. [2022-03-01 18:21:03,055 INFO L78 Accepts]: Start accepts. Automaton has 11412 states and 41237 transitions. Word has length 28 [2022-03-01 18:21:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:03,055 INFO L470 AbstractCegarLoop]: Abstraction has 11412 states and 41237 transitions. [2022-03-01 18:21:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 11412 states and 41237 transitions. [2022-03-01 18:21:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:03,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:03,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:03,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:03,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:03,279 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1670893074, now seen corresponding path program 84 times [2022-03-01 18:21:03,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:03,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845244066] [2022-03-01 18:21:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:03,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:03,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:03,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845244066] [2022-03-01 18:21:03,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845244066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:03,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277831391] [2022-03-01 18:21:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:03,506 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:03,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 18:21:03,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:21:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:03,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:03,775 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 22 [2022-03-01 18:21:03,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:21:03,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:21:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:03,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:04,030 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:04,031 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 34 treesize of output 59 [2022-03-01 18:21:04,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:04,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:04,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-01 18:21:04,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:04,155 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:04,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:04,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:04,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:04,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-01 18:21:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:04,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277831391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:04,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:04,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 18:21:04,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414874784] [2022-03-01 18:21:04,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:04,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:21:04,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:21:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:21:04,280 INFO L87 Difference]: Start difference. First operand 11412 states and 41237 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 18:21:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:04,751 INFO L93 Difference]: Finished difference Result 11607 states and 41785 transitions. [2022-03-01 18:21:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:21:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 28 [2022-03-01 18:21:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:04,782 INFO L225 Difference]: With dead ends: 11607 [2022-03-01 18:21:04,782 INFO L226 Difference]: Without dead ends: 11548 [2022-03-01 18:21:04,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:21:04,782 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:04,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 201 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 832 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-03-01 18:21:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11548 states. [2022-03-01 18:21:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11548 to 11432. [2022-03-01 18:21:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11432 states, 11431 states have (on average 3.6128072784533285) internal successors, (41298), 11431 states have internal predecessors, (41298), 0 states have call successors, (0), 0 states 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 18:21:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11432 states to 11432 states and 41298 transitions. [2022-03-01 18:21:04,986 INFO L78 Accepts]: Start accepts. Automaton has 11432 states and 41298 transitions. Word has length 28 [2022-03-01 18:21:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:04,986 INFO L470 AbstractCegarLoop]: Abstraction has 11432 states and 41298 transitions. [2022-03-01 18:21:04,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 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 18:21:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11432 states and 41298 transitions. [2022-03-01 18:21:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:05,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:05,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:05,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:05,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:05,221 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -683401462, now seen corresponding path program 85 times [2022-03-01 18:21:05,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:05,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528758949] [2022-03-01 18:21:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:05,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:05,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:05,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528758949] [2022-03-01 18:21:05,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528758949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:05,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455621165] [2022-03-01 18:21:05,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:05,404 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:05,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 18:21:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:05,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:05,689 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 31 treesize of output 27 [2022-03-01 18:21:05,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-01 18:21:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:05,748 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 36 treesize of output 24 [2022-03-01 18:21:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:05,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:05,916 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:05,916 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 34 treesize of output 59 [2022-03-01 18:21:05,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:05,997 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 17 [2022-03-01 18:21:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:06,054 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:06,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:06,181 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 23 treesize of output 7 [2022-03-01 18:21:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:06,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455621165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:06,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:06,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:06,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850715801] [2022-03-01 18:21:06,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:06,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:06,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:06,236 INFO L87 Difference]: Start difference. First operand 11432 states and 41298 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:06,680 INFO L93 Difference]: Finished difference Result 11602 states and 41770 transitions. [2022-03-01 18:21:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:21:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:21:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:06,707 INFO L225 Difference]: With dead ends: 11602 [2022-03-01 18:21:06,708 INFO L226 Difference]: Without dead ends: 11581 [2022-03-01 18:21:06,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:21:06,708 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:06,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 151 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:21:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11581 states. [2022-03-01 18:21:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11581 to 11435. [2022-03-01 18:21:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 11434 states have (on average 3.613258702116495) internal successors, (41314), 11434 states have internal predecessors, (41314), 0 states have call successors, (0), 0 states 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 18:21:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 41314 transitions. [2022-03-01 18:21:06,903 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 41314 transitions. Word has length 28 [2022-03-01 18:21:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 11435 states and 41314 transitions. [2022-03-01 18:21:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 41314 transitions. [2022-03-01 18:21:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:06,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:06,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:06,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:07,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:07,127 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1328510830, now seen corresponding path program 86 times [2022-03-01 18:21:07,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:07,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045224024] [2022-03-01 18:21:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:07,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:07,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045224024] [2022-03-01 18:21:07,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045224024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:07,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419676387] [2022-03-01 18:21:07,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:07,322 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:07,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 18:21:07,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:07,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:07,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:07,532 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 24 [2022-03-01 18:21:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,558 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 39 treesize of output 27 [2022-03-01 18:21:07,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:21:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:07,730 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:07,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-03-01 18:21:07,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,800 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 17 [2022-03-01 18:21:07,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,844 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:07,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,889 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 23 treesize of output 7 [2022-03-01 18:21:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:07,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419676387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:07,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:07,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:07,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899386488] [2022-03-01 18:21:07,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:07,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:07,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:07,924 INFO L87 Difference]: Start difference. First operand 11435 states and 41314 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:08,335 INFO L93 Difference]: Finished difference Result 11724 states and 42165 transitions. [2022-03-01 18:21:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:21:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:21:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:08,363 INFO L225 Difference]: With dead ends: 11724 [2022-03-01 18:21:08,363 INFO L226 Difference]: Without dead ends: 11709 [2022-03-01 18:21:08,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:21:08,363 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:08,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 230 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:21:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2022-03-01 18:21:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11466. [2022-03-01 18:21:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11466 states, 11465 states have (on average 3.6139555167902313) internal successors, (41434), 11465 states have internal predecessors, (41434), 0 states have call successors, (0), 0 states 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 18:21:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11466 states to 11466 states and 41434 transitions. [2022-03-01 18:21:08,558 INFO L78 Accepts]: Start accepts. Automaton has 11466 states and 41434 transitions. Word has length 28 [2022-03-01 18:21:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:08,558 INFO L470 AbstractCegarLoop]: Abstraction has 11466 states and 41434 transitions. [2022-03-01 18:21:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11466 states and 41434 transitions. [2022-03-01 18:21:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:08,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:08,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:08,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 18:21:08,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-01 18:21:08,792 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1120177546, now seen corresponding path program 87 times [2022-03-01 18:21:08,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:08,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842567867] [2022-03-01 18:21:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:09,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:09,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842567867] [2022-03-01 18:21:09,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842567867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:09,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121049605] [2022-03-01 18:21:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:09,054 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:09,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 18:21:09,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:21:09,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:09,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:21:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:09,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:09,358 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 31 treesize of output 27 [2022-03-01 18:21:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:09,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:09,451 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 39 treesize of output 43 [2022-03-01 18:21:10,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:10,084 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 64 treesize of output 72 [2022-03-01 18:21:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:10,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:10,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:10,988 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 56 treesize of output 61 [2022-03-01 18:21:11,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:11,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:11,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:11,169 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 45 treesize of output 40 [2022-03-01 18:21:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:11,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121049605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:11,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:11,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 31 [2022-03-01 18:21:11,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883637050] [2022-03-01 18:21:11,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:11,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:21:11,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:21:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:21:11,237 INFO L87 Difference]: Start difference. First operand 11466 states and 41434 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 18:21:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:13,573 INFO L93 Difference]: Finished difference Result 19431 states and 68298 transitions. [2022-03-01 18:21:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:21:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 28 [2022-03-01 18:21:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:13,630 INFO L225 Difference]: With dead ends: 19431 [2022-03-01 18:21:13,630 INFO L226 Difference]: Without dead ends: 19417 [2022-03-01 18:21:13,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=669, Invalid=5651, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 18:21:13,631 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 216 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2699 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:13,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 647 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 807 Invalid, 0 Unknown, 2699 Unchecked, 0.3s Time] [2022-03-01 18:21:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19417 states. [2022-03-01 18:21:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19417 to 11508. [2022-03-01 18:21:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 3.613105066481272) internal successors, (41576), 11507 states have internal predecessors, (41576), 0 states have call successors, (0), 0 states 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 18:21:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 41576 transitions. [2022-03-01 18:21:13,916 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 41576 transitions. Word has length 28 [2022-03-01 18:21:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:13,916 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 41576 transitions. [2022-03-01 18:21:13,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 18:21:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 41576 transitions. [2022-03-01 18:21:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:13,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:13,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:13,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:14,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-01 18:21:14,151 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -908959978, now seen corresponding path program 88 times [2022-03-01 18:21:14,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:14,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022750880] [2022-03-01 18:21:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:14,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:14,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022750880] [2022-03-01 18:21:14,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022750880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:14,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953845659] [2022-03-01 18:21:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:14,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:14,354 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:14,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 18:21:14,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:14,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:14,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:14,580 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 24 treesize of output 20 [2022-03-01 18:21:14,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:21:14,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 18:21:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:14,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:14,829 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:14,829 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 58 [2022-03-01 18:21:14,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:14,923 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 17 [2022-03-01 18:21:14,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,991 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:14,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:15,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:15,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:15,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:15,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953845659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:15,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:15,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:15,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727248150] [2022-03-01 18:21:15,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:15,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:15,104 INFO L87 Difference]: Start difference. First operand 11508 states and 41576 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:16,561 INFO L93 Difference]: Finished difference Result 18248 states and 64138 transitions. [2022-03-01 18:21:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:21:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:21:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:16,607 INFO L225 Difference]: With dead ends: 18248 [2022-03-01 18:21:16,607 INFO L226 Difference]: Without dead ends: 18223 [2022-03-01 18:21:16,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:21:16,607 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:16,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 319 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:21:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18223 states. [2022-03-01 18:21:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18223 to 11481. [2022-03-01 18:21:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11481 states, 11480 states have (on average 3.6137630662020905) internal successors, (41486), 11480 states have internal predecessors, (41486), 0 states have call successors, (0), 0 states 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 18:21:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11481 states to 11481 states and 41486 transitions. [2022-03-01 18:21:16,896 INFO L78 Accepts]: Start accepts. Automaton has 11481 states and 41486 transitions. Word has length 28 [2022-03-01 18:21:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:16,896 INFO L470 AbstractCegarLoop]: Abstraction has 11481 states and 41486 transitions. [2022-03-01 18:21:16,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11481 states and 41486 transitions. [2022-03-01 18:21:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:16,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:16,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:16,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:17,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:17,127 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1021738998, now seen corresponding path program 89 times [2022-03-01 18:21:17,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:17,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116967990] [2022-03-01 18:21:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:17,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:17,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116967990] [2022-03-01 18:21:17,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116967990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:17,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147161248] [2022-03-01 18:21:17,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:17,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:17,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:17,336 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:17,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 18:21:17,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:21:17,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:17,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:17,564 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 31 treesize of output 27 [2022-03-01 18:21:17,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-01 18:21:17,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:17,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:17,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:21:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:17,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:17,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:17,878 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 34 treesize of output 59 [2022-03-01 18:21:17,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:17,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:17,945 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 17 [2022-03-01 18:21:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:18,011 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:18,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:18,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,065 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 23 treesize of output 7 [2022-03-01 18:21:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:18,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147161248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:18,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:18,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:18,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808508594] [2022-03-01 18:21:18,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:18,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:18,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:18,111 INFO L87 Difference]: Start difference. First operand 11481 states and 41486 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:18,516 INFO L93 Difference]: Finished difference Result 11772 states and 42335 transitions. [2022-03-01 18:21:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:21:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:21:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:18,544 INFO L225 Difference]: With dead ends: 11772 [2022-03-01 18:21:18,544 INFO L226 Difference]: Without dead ends: 11757 [2022-03-01 18:21:18,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:21:18,545 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:18,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:21:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2022-03-01 18:21:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11473. [2022-03-01 18:21:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11473 states, 11472 states have (on average 3.614539748953975) internal successors, (41466), 11472 states have internal predecessors, (41466), 0 states have call successors, (0), 0 states 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 18:21:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11473 states to 11473 states and 41466 transitions. [2022-03-01 18:21:18,749 INFO L78 Accepts]: Start accepts. Automaton has 11473 states and 41466 transitions. Word has length 28 [2022-03-01 18:21:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:18,751 INFO L470 AbstractCegarLoop]: Abstraction has 11473 states and 41466 transitions. [2022-03-01 18:21:18,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11473 states and 41466 transitions. [2022-03-01 18:21:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:18,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:18,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:18,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:18,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:18,985 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash 408275564, now seen corresponding path program 90 times [2022-03-01 18:21:18,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:18,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904279435] [2022-03-01 18:21:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:19,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:19,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904279435] [2022-03-01 18:21:19,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904279435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:19,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407508371] [2022-03-01 18:21:19,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:19,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:19,166 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 18:21:19,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:21:19,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:21:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:19,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:19,580 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 24 treesize of output 20 [2022-03-01 18:21:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:19,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:19,583 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 39 treesize of output 27 [2022-03-01 18:21:19,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:19,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2022-03-01 18:21:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:19,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:19,965 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:21:19,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 89 [2022-03-01 18:21:20,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:20,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:20,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:20,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:20,161 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 23 treesize of output 6 [2022-03-01 18:21:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:20,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407508371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:20,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:20,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:21:20,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339190885] [2022-03-01 18:21:20,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:21:20,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:21:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:21:20,235 INFO L87 Difference]: Start difference. First operand 11473 states and 41466 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 18:21:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:26,365 INFO L93 Difference]: Finished difference Result 23033 states and 79142 transitions. [2022-03-01 18:21:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-01 18:21:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 28 [2022-03-01 18:21:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:26,425 INFO L225 Difference]: With dead ends: 23033 [2022-03-01 18:21:26,425 INFO L226 Difference]: Without dead ends: 22882 [2022-03-01 18:21:26,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2097, Invalid=14933, Unknown=0, NotChecked=0, Total=17030 [2022-03-01 18:21:26,427 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 407 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1715 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:26,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 555 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1682 Invalid, 0 Unknown, 1715 Unchecked, 0.8s Time] [2022-03-01 18:21:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22882 states. [2022-03-01 18:21:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22882 to 11855. [2022-03-01 18:21:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 3.615235363590349) internal successors, (42855), 11854 states have internal predecessors, (42855), 0 states have call successors, (0), 0 states 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 18:21:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 42855 transitions. [2022-03-01 18:21:26,726 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 42855 transitions. Word has length 28 [2022-03-01 18:21:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:26,726 INFO L470 AbstractCegarLoop]: Abstraction has 11855 states and 42855 transitions. [2022-03-01 18:21:26,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 18:21:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 42855 transitions. [2022-03-01 18:21:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:26,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:26,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:26,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:26,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:26,962 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -382716142, now seen corresponding path program 91 times [2022-03-01 18:21:26,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:26,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6652336] [2022-03-01 18:21:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:27,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:27,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6652336] [2022-03-01 18:21:27,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6652336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:27,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117157322] [2022-03-01 18:21:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:27,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:27,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:27,107 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:27,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 18:21:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:27,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,484 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 49 treesize of output 37 [2022-03-01 18:21:27,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:21:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:27,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:27,641 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:27,642 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 58 [2022-03-01 18:21:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:27,697 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 17 [2022-03-01 18:21:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,757 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:27,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:27,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:27,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117157322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:27,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:27,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:27,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693579677] [2022-03-01 18:21:27,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:27,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:27,885 INFO L87 Difference]: Start difference. First operand 11855 states and 42855 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:21:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:28,609 INFO L93 Difference]: Finished difference Result 15729 states and 55768 transitions. [2022-03-01 18:21:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:21:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 28 [2022-03-01 18:21:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:28,646 INFO L225 Difference]: With dead ends: 15729 [2022-03-01 18:21:28,646 INFO L226 Difference]: Without dead ends: 15687 [2022-03-01 18:21:28,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:21:28,647 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:28,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 334 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1007 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-03-01 18:21:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15687 states. [2022-03-01 18:21:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15687 to 11828. [2022-03-01 18:21:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11828 states, 11827 states have (on average 3.6177390716157944) internal successors, (42787), 11827 states have internal predecessors, (42787), 0 states have call successors, (0), 0 states 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 18:21:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11828 states to 11828 states and 42787 transitions. [2022-03-01 18:21:28,873 INFO L78 Accepts]: Start accepts. Automaton has 11828 states and 42787 transitions. Word has length 28 [2022-03-01 18:21:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:28,873 INFO L470 AbstractCegarLoop]: Abstraction has 11828 states and 42787 transitions. [2022-03-01 18:21:28,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:21:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 11828 states and 42787 transitions. [2022-03-01 18:21:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:28,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:28,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:28,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 18:21:29,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 18:21:29,095 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -264943398, now seen corresponding path program 92 times [2022-03-01 18:21:29,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:29,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043123320] [2022-03-01 18:21:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:29,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:29,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043123320] [2022-03-01 18:21:29,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043123320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:29,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758045961] [2022-03-01 18:21:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:29,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:29,307 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:29,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 18:21:29,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:29,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:29,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:21:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:29,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:29,895 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 24 treesize of output 20 [2022-03-01 18:21:29,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:29,907 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 25 treesize of output 33 [2022-03-01 18:21:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:29,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:29,911 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 46 treesize of output 30 [2022-03-01 18:21:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:30,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:30,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:30,413 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 63 treesize of output 80 [2022-03-01 18:21:30,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:30,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:30,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:30,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:30,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758045961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:30,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:30,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-01 18:21:30,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074686001] [2022-03-01 18:21:30,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:30,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:21:30,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:21:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:21:30,715 INFO L87 Difference]: Start difference. First operand 11828 states and 42787 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:32,189 INFO L93 Difference]: Finished difference Result 17408 states and 61505 transitions. [2022-03-01 18:21:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:21:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:21:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:32,243 INFO L225 Difference]: With dead ends: 17408 [2022-03-01 18:21:32,243 INFO L226 Difference]: Without dead ends: 17370 [2022-03-01 18:21:32,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=488, Invalid=2704, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:21:32,243 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:32,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 406 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 472 Invalid, 0 Unknown, 735 Unchecked, 0.2s Time] [2022-03-01 18:21:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17370 states. [2022-03-01 18:21:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17370 to 12017. [2022-03-01 18:21:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12016 states have (on average 3.6132656458055927) internal successors, (43417), 12016 states have internal predecessors, (43417), 0 states have call successors, (0), 0 states 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 18:21:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 43417 transitions. [2022-03-01 18:21:32,516 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 43417 transitions. Word has length 28 [2022-03-01 18:21:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:32,516 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 43417 transitions. [2022-03-01 18:21:32,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 43417 transitions. [2022-03-01 18:21:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:32,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:32,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:32,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 18:21:32,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 18:21:32,754 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash -583789598, now seen corresponding path program 93 times [2022-03-01 18:21:32,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:32,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10807426] [2022-03-01 18:21:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:32,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:32,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:32,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10807426] [2022-03-01 18:21:32,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10807426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:32,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424756564] [2022-03-01 18:21:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:32,951 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:32,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 18:21:32,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:21:32,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:21:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:33,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:33,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:33,510 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 42 treesize of output 46 [2022-03-01 18:21:33,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:33,525 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 80 treesize of output 82 [2022-03-01 18:21:33,528 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 59 treesize of output 49 [2022-03-01 18:21:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:33,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:34,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:34,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:34,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:34,082 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 59 treesize of output 76 [2022-03-01 18:21:34,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:34,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:34,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 74 [2022-03-01 18:21:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:34,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424756564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:34,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:34,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-01 18:21:34,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911645950] [2022-03-01 18:21:34,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:21:34,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:21:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:21:34,396 INFO L87 Difference]: Start difference. First operand 12017 states and 43417 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:36,243 INFO L93 Difference]: Finished difference Result 17166 states and 59920 transitions. [2022-03-01 18:21:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:21:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:21:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:36,284 INFO L225 Difference]: With dead ends: 17166 [2022-03-01 18:21:36,284 INFO L226 Difference]: Without dead ends: 17105 [2022-03-01 18:21:36,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=496, Invalid=3664, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:21:36,286 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1410 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:36,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 434 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 750 Invalid, 0 Unknown, 1410 Unchecked, 0.3s Time] [2022-03-01 18:21:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17105 states. [2022-03-01 18:21:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17105 to 11963. [2022-03-01 18:21:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11963 states, 11962 states have (on average 3.6173716769770943) internal successors, (43271), 11962 states have internal predecessors, (43271), 0 states have call successors, (0), 0 states 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 18:21:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11963 states to 11963 states and 43271 transitions. [2022-03-01 18:21:36,534 INFO L78 Accepts]: Start accepts. Automaton has 11963 states and 43271 transitions. Word has length 28 [2022-03-01 18:21:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:36,535 INFO L470 AbstractCegarLoop]: Abstraction has 11963 states and 43271 transitions. [2022-03-01 18:21:36,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11963 states and 43271 transitions. [2022-03-01 18:21:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:36,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:36,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:36,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 18:21:36,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 18:21:36,766 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -863494902, now seen corresponding path program 94 times [2022-03-01 18:21:36,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:36,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616004681] [2022-03-01 18:21:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:36,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:36,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616004681] [2022-03-01 18:21:36,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616004681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:36,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423501109] [2022-03-01 18:21:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:36,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:36,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:36,963 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:36,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 18:21:37,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:37,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:37,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:37,331 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 24 treesize of output 20 [2022-03-01 18:21:37,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:21:37,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:21:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:37,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:37,524 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 58 [2022-03-01 18:21:37,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:37,594 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 17 [2022-03-01 18:21:37,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,640 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:37,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:37,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:37,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423501109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:37,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:37,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:37,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392648617] [2022-03-01 18:21:37,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:37,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:37,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:37,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:37,754 INFO L87 Difference]: Start difference. First operand 11963 states and 43271 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 18:21:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:39,288 INFO L93 Difference]: Finished difference Result 13981 states and 49064 transitions. [2022-03-01 18:21:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:21:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 28 [2022-03-01 18:21:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:39,320 INFO L225 Difference]: With dead ends: 13981 [2022-03-01 18:21:39,320 INFO L226 Difference]: Without dead ends: 13951 [2022-03-01 18:21:39,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:21:39,320 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 171 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:39,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 420 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:21:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2022-03-01 18:21:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 12081. [2022-03-01 18:21:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12081 states, 12080 states have (on average 3.6149834437086095) internal successors, (43669), 12080 states have internal predecessors, (43669), 0 states have call successors, (0), 0 states 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 18:21:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12081 states to 12081 states and 43669 transitions. [2022-03-01 18:21:39,553 INFO L78 Accepts]: Start accepts. Automaton has 12081 states and 43669 transitions. Word has length 28 [2022-03-01 18:21:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:39,553 INFO L470 AbstractCegarLoop]: Abstraction has 12081 states and 43669 transitions. [2022-03-01 18:21:39,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 18:21:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12081 states and 43669 transitions. [2022-03-01 18:21:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:39,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:39,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:39,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:39,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 18:21:39,789 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -238835894, now seen corresponding path program 95 times [2022-03-01 18:21:39,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:39,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145726013] [2022-03-01 18:21:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:39,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:39,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145726013] [2022-03-01 18:21:39,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145726013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:39,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731297440] [2022-03-01 18:21:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:39,994 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:39,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 18:21:40,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:21:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:40,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:40,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-01 18:21:40,375 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 18:21:40,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-01 18:21:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:40,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:40,528 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:40,529 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 58 [2022-03-01 18:21:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:40,582 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 17 [2022-03-01 18:21:40,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,621 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:40,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:40,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:40,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:40,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731297440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:40,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:40,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:21:40,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100322819] [2022-03-01 18:21:40,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:40,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:21:40,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:21:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:21:40,717 INFO L87 Difference]: Start difference. First operand 12081 states and 43669 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:42,188 INFO L93 Difference]: Finished difference Result 13944 states and 48964 transitions. [2022-03-01 18:21:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:21:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:21:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:42,293 INFO L225 Difference]: With dead ends: 13944 [2022-03-01 18:21:42,293 INFO L226 Difference]: Without dead ends: 13839 [2022-03-01 18:21:42,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:21:42,293 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:42,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 499 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:21:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2022-03-01 18:21:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 12098. [2022-03-01 18:21:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12098 states, 12097 states have (on average 3.6147805240968833) internal successors, (43728), 12097 states have internal predecessors, (43728), 0 states have call successors, (0), 0 states 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 18:21:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12098 states to 12098 states and 43728 transitions. [2022-03-01 18:21:42,493 INFO L78 Accepts]: Start accepts. Automaton has 12098 states and 43728 transitions. Word has length 28 [2022-03-01 18:21:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 12098 states and 43728 transitions. [2022-03-01 18:21:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:21:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12098 states and 43728 transitions. [2022-03-01 18:21:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:42,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:42,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:42,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:42,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:42,727 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2027733386, now seen corresponding path program 96 times [2022-03-01 18:21:42,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:42,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053508351] [2022-03-01 18:21:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:42,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:42,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053508351] [2022-03-01 18:21:42,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053508351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:42,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34359379] [2022-03-01 18:21:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:42,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:42,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:42,913 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:42,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 18:21:42,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:21:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:21:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:43,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:43,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:21:43,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:43,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-01 18:21:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:43,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:43,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:43,747 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:43,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-03-01 18:21:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:43,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-01 18:21:43,892 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:21:43,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-03-01 18:21:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:44,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34359379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:44,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:44,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:21:44,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049126120] [2022-03-01 18:21:44,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:21:44,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:21:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:21:44,114 INFO L87 Difference]: Start difference. First operand 12098 states and 43728 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 18:21:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:47,721 INFO L93 Difference]: Finished difference Result 17935 states and 62573 transitions. [2022-03-01 18:21:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:21:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 28 [2022-03-01 18:21:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:47,765 INFO L225 Difference]: With dead ends: 17935 [2022-03-01 18:21:47,765 INFO L226 Difference]: Without dead ends: 17886 [2022-03-01 18:21:47,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=625, Invalid=4205, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:21:47,766 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:47,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 839 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:21:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17886 states. [2022-03-01 18:21:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17886 to 12447. [2022-03-01 18:21:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12446 states have (on average 3.611120038566608) internal successors, (44944), 12446 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states 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 18:21:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 44944 transitions. [2022-03-01 18:21:48,085 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 44944 transitions. Word has length 28 [2022-03-01 18:21:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 44944 transitions. [2022-03-01 18:21:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 18:21:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 44944 transitions. [2022-03-01 18:21:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:48,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:48,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:48,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 18:21:48,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-01 18:21:48,322 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1545588618, now seen corresponding path program 97 times [2022-03-01 18:21:48,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:48,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256655388] [2022-03-01 18:21:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:48,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:48,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256655388] [2022-03-01 18:21:48,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256655388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:48,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327898260] [2022-03-01 18:21:48,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:48,517 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:48,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 18:21:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:48,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:48,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-01 18:21:48,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:48,985 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 37 treesize of output 25 [2022-03-01 18:21:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:49,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:49,160 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:49,160 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 58 [2022-03-01 18:21:49,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:49,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:49,210 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 17 [2022-03-01 18:21:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:49,242 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:49,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:49,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:49,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:49,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:49,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327898260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:49,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:49,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:49,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949446065] [2022-03-01 18:21:49,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:49,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:49,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:49,316 INFO L87 Difference]: Start difference. First operand 12447 states and 44944 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:21:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:49,800 INFO L93 Difference]: Finished difference Result 15454 states and 54900 transitions. [2022-03-01 18:21:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:21:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:21:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:49,899 INFO L225 Difference]: With dead ends: 15454 [2022-03-01 18:21:49,899 INFO L226 Difference]: Without dead ends: 15429 [2022-03-01 18:21:49,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:49,899 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:49,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 351 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 317 Unchecked, 0.2s Time] [2022-03-01 18:21:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15429 states. [2022-03-01 18:21:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15429 to 12476. [2022-03-01 18:21:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 12475 states have (on average 3.611062124248497) internal successors, (45048), 12475 states have internal predecessors, (45048), 0 states have call successors, (0), 0 states 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 18:21:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 45048 transitions. [2022-03-01 18:21:50,161 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 45048 transitions. Word has length 28 [2022-03-01 18:21:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 12476 states and 45048 transitions. [2022-03-01 18:21:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:21:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 45048 transitions. [2022-03-01 18:21:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:50,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:50,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:50,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:50,402 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1788059100, now seen corresponding path program 98 times [2022-03-01 18:21:50,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:50,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108421537] [2022-03-01 18:21:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:50,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:50,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108421537] [2022-03-01 18:21:50,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108421537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:50,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345455342] [2022-03-01 18:21:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:50,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:50,593 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:50,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 18:21:50,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:50,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:50,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:21:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:50,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:50,974 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 37 treesize of output 25 [2022-03-01 18:21:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:50,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:51,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:51,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-03-01 18:21:51,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:51,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:51,135 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 17 [2022-03-01 18:21:51,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:51,170 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:51,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:51,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:51,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345455342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:51,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:51,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:51,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163334891] [2022-03-01 18:21:51,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:51,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:51,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:51,247 INFO L87 Difference]: Start difference. First operand 12476 states and 45048 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:21:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:51,794 INFO L93 Difference]: Finished difference Result 15674 states and 55504 transitions. [2022-03-01 18:21:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:21:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:21:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:51,835 INFO L225 Difference]: With dead ends: 15674 [2022-03-01 18:21:51,835 INFO L226 Difference]: Without dead ends: 15649 [2022-03-01 18:21:51,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:51,836 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:51,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 360 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 685 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-03-01 18:21:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15649 states. [2022-03-01 18:21:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15649 to 12525. [2022-03-01 18:21:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12525 states, 12524 states have (on average 3.6096295113382304) internal successors, (45207), 12524 states have internal predecessors, (45207), 0 states have call successors, (0), 0 states 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 18:21:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12525 states to 12525 states and 45207 transitions. [2022-03-01 18:21:52,195 INFO L78 Accepts]: Start accepts. Automaton has 12525 states and 45207 transitions. Word has length 28 [2022-03-01 18:21:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:52,196 INFO L470 AbstractCegarLoop]: Abstraction has 12525 states and 45207 transitions. [2022-03-01 18:21:52,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:21:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12525 states and 45207 transitions. [2022-03-01 18:21:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:52,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:52,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:52,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 18:21:52,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:52,427 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 99553010, now seen corresponding path program 99 times [2022-03-01 18:21:52,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:52,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389196669] [2022-03-01 18:21:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:52,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:52,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389196669] [2022-03-01 18:21:52,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389196669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:52,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896881879] [2022-03-01 18:21:52,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:52,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:52,626 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:52,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 18:21:52,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:21:52,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:21:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:53,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:53,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:21:53,099 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 18:21:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,101 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 36 treesize of output 24 [2022-03-01 18:21:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:53,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:53,288 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:53,289 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 33 treesize of output 58 [2022-03-01 18:21:53,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:53,364 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 17 [2022-03-01 18:21:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,412 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:53,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:53,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:53,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:53,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:53,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896881879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:53,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:53,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:53,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830461964] [2022-03-01 18:21:53,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:53,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:53,530 INFO L87 Difference]: Start difference. First operand 12525 states and 45207 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:21:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:53,785 INFO L93 Difference]: Finished difference Result 12947 states and 46353 transitions. [2022-03-01 18:21:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:21:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:21:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:53,816 INFO L225 Difference]: With dead ends: 12947 [2022-03-01 18:21:53,816 INFO L226 Difference]: Without dead ends: 12944 [2022-03-01 18:21:53,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:21:53,816 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:53,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 426 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-03-01 18:21:53,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12944 states. [2022-03-01 18:21:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12944 to 12539. [2022-03-01 18:21:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12539 states, 12538 states have (on average 3.60894879566119) internal successors, (45249), 12538 states have internal predecessors, (45249), 0 states have call successors, (0), 0 states 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 18:21:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 45249 transitions. [2022-03-01 18:21:54,052 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 45249 transitions. Word has length 28 [2022-03-01 18:21:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:54,052 INFO L470 AbstractCegarLoop]: Abstraction has 12539 states and 45249 transitions. [2022-03-01 18:21:54,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:21:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 45249 transitions. [2022-03-01 18:21:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:54,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:54,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:54,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:54,291 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash 96927234, now seen corresponding path program 100 times [2022-03-01 18:21:54,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:54,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456618008] [2022-03-01 18:21:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:54,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456618008] [2022-03-01 18:21:54,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456618008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957388487] [2022-03-01 18:21:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:54,483 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:54,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 18:21:54,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:54,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:54,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:54,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:21:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:54,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,888 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 37 treesize of output 25 [2022-03-01 18:21:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:54,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:55,048 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:55,048 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 58 [2022-03-01 18:21:55,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:55,096 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 17 [2022-03-01 18:21:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,225 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:55,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:55,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:55,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:55,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957388487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:55,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:55,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:55,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485341547] [2022-03-01 18:21:55,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:55,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:55,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:55,340 INFO L87 Difference]: Start difference. First operand 12539 states and 45249 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:21:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:56,026 INFO L93 Difference]: Finished difference Result 15585 states and 55320 transitions. [2022-03-01 18:21:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:21:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:21:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:56,069 INFO L225 Difference]: With dead ends: 15585 [2022-03-01 18:21:56,069 INFO L226 Difference]: Without dead ends: 15560 [2022-03-01 18:21:56,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:56,070 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:56,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 711 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-03-01 18:21:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2022-03-01 18:21:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 12533. [2022-03-01 18:21:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12533 states, 12532 states have (on average 3.608203000319183) internal successors, (45218), 12532 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states 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 18:21:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12533 states to 12533 states and 45218 transitions. [2022-03-01 18:21:56,334 INFO L78 Accepts]: Start accepts. Automaton has 12533 states and 45218 transitions. Word has length 28 [2022-03-01 18:21:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:56,334 INFO L470 AbstractCegarLoop]: Abstraction has 12533 states and 45218 transitions. [2022-03-01 18:21:56,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:21:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12533 states and 45218 transitions. [2022-03-01 18:21:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:56,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:56,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:56,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:56,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-01 18:21:56,574 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1446684146, now seen corresponding path program 101 times [2022-03-01 18:21:56,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:56,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699157402] [2022-03-01 18:21:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:56,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:56,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699157402] [2022-03-01 18:21:56,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699157402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:56,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582125240] [2022-03-01 18:21:56,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:56,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:56,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:56,773 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:56,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 18:21:56,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:21:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:21:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:57,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:21:57,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-01 18:21:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,303 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 32 treesize of output 20 [2022-03-01 18:21:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:57,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:57,488 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:21:57,488 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 58 [2022-03-01 18:21:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,562 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 17 [2022-03-01 18:21:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,609 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:21:57,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:21:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:21:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:57,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582125240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:57,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:57,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:21:57,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708015064] [2022-03-01 18:21:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:21:57,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:21:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:21:57,711 INFO L87 Difference]: Start difference. First operand 12533 states and 45218 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:21:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:58,138 INFO L93 Difference]: Finished difference Result 15484 states and 55042 transitions. [2022-03-01 18:21:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:21:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 28 [2022-03-01 18:21:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:58,172 INFO L225 Difference]: With dead ends: 15484 [2022-03-01 18:21:58,172 INFO L226 Difference]: Without dead ends: 15373 [2022-03-01 18:21:58,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:58,173 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 280 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 382 Unchecked, 0.2s Time] [2022-03-01 18:21:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15373 states. [2022-03-01 18:21:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15373 to 12642. [2022-03-01 18:21:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12642 states, 12641 states have (on average 3.6035914880151885) internal successors, (45553), 12641 states have internal predecessors, (45553), 0 states have call successors, (0), 0 states 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 18:21:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 45553 transitions. [2022-03-01 18:21:58,454 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 45553 transitions. Word has length 28 [2022-03-01 18:21:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:58,454 INFO L470 AbstractCegarLoop]: Abstraction has 12642 states and 45553 transitions. [2022-03-01 18:21:58,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:21:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 45553 transitions. [2022-03-01 18:21:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:21:58,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:58,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:58,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:58,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:58,691 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -378809582, now seen corresponding path program 102 times [2022-03-01 18:21:58,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:58,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503133314] [2022-03-01 18:21:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:58,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:58,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:58,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503133314] [2022-03-01 18:21:58,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503133314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:58,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453935603] [2022-03-01 18:21:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:58,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:58,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:58,912 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:58,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 18:21:58,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:21:58,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:21:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:59,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:21:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:59,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:59,367 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 42 treesize of output 46 [2022-03-01 18:21:59,370 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 69 treesize of output 59 [2022-03-01 18:21:59,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:59,529 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 63 treesize of output 63 [2022-03-01 18:21:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:00,136 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 60 treesize of output 55 [2022-03-01 18:22:00,230 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:22:00,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-03-01 18:22:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:00,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453935603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:00,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:00,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-01 18:22:00,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691175058] [2022-03-01 18:22:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:22:00,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:22:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:22:00,438 INFO L87 Difference]: Start difference. First operand 12642 states and 45553 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:02,892 INFO L93 Difference]: Finished difference Result 21374 states and 74964 transitions. [2022-03-01 18:22:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:22:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:02,955 INFO L225 Difference]: With dead ends: 21374 [2022-03-01 18:22:02,955 INFO L226 Difference]: Without dead ends: 21344 [2022-03-01 18:22:02,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=751, Invalid=4799, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:22:02,956 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 282 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1368 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:02,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 517 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 886 Invalid, 0 Unknown, 1368 Unchecked, 0.3s Time] [2022-03-01 18:22:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21344 states. [2022-03-01 18:22:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21344 to 12660. [2022-03-01 18:22:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.602417252547595) internal successors, (45603), 12659 states have internal predecessors, (45603), 0 states have call successors, (0), 0 states 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 18:22:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45603 transitions. [2022-03-01 18:22:03,281 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45603 transitions. Word has length 28 [2022-03-01 18:22:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:03,281 INFO L470 AbstractCegarLoop]: Abstraction has 12660 states and 45603 transitions. [2022-03-01 18:22:03,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45603 transitions. [2022-03-01 18:22:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:03,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:03,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:03,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:03,520 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 714160914, now seen corresponding path program 103 times [2022-03-01 18:22:03,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:03,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116544193] [2022-03-01 18:22:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:03,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:03,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116544193] [2022-03-01 18:22:03,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116544193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:03,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080522983] [2022-03-01 18:22:03,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:03,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:03,755 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:03,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 18:22:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:04,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,163 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 49 treesize of output 37 [2022-03-01 18:22:04,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:22:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:04,387 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:04,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-01 18:22:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,443 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 34 treesize of output 18 [2022-03-01 18:22:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,489 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:04,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:22:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080522983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:04,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:04,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:04,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005893021] [2022-03-01 18:22:04,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:04,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:04,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:04,606 INFO L87 Difference]: Start difference. First operand 12660 states and 45603 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:05,412 INFO L93 Difference]: Finished difference Result 15695 states and 55675 transitions. [2022-03-01 18:22:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:22:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:05,450 INFO L225 Difference]: With dead ends: 15695 [2022-03-01 18:22:05,450 INFO L226 Difference]: Without dead ends: 15656 [2022-03-01 18:22:05,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:22:05,451 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:05,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1063 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-03-01 18:22:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15656 states. [2022-03-01 18:22:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15656 to 12707. [2022-03-01 18:22:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12707 states, 12706 states have (on average 3.6011333228396034) internal successors, (45756), 12706 states have internal predecessors, (45756), 0 states have call successors, (0), 0 states 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 18:22:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12707 states to 12707 states and 45756 transitions. [2022-03-01 18:22:05,727 INFO L78 Accepts]: Start accepts. Automaton has 12707 states and 45756 transitions. Word has length 28 [2022-03-01 18:22:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:05,727 INFO L470 AbstractCegarLoop]: Abstraction has 12707 states and 45756 transitions. [2022-03-01 18:22:05,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12707 states and 45756 transitions. [2022-03-01 18:22:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:05,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:05,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:05,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 18:22:05,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-01 18:22:05,963 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1286557074, now seen corresponding path program 104 times [2022-03-01 18:22:05,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:05,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147081300] [2022-03-01 18:22:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:06,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:06,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147081300] [2022-03-01 18:22:06,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147081300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:06,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637656455] [2022-03-01 18:22:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:06,171 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:06,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 18:22:06,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:06,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:06,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:06,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:06,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-01 18:22:06,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:22:06,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:22:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:06,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:06,745 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:06,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-01 18:22:06,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:06,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:06,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-01 18:22:06,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:06,859 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:06,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:06,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:06,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:06,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637656455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:06,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:06,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:06,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231867631] [2022-03-01 18:22:06,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:06,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:06,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:06,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:06,981 INFO L87 Difference]: Start difference. First operand 12707 states and 45756 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:07,475 INFO L93 Difference]: Finished difference Result 12916 states and 46277 transitions. [2022-03-01 18:22:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:22:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:07,507 INFO L225 Difference]: With dead ends: 12916 [2022-03-01 18:22:07,507 INFO L226 Difference]: Without dead ends: 12890 [2022-03-01 18:22:07,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:22:07,507 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 108 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:07,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 300 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 924 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-03-01 18:22:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2022-03-01 18:22:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12746. [2022-03-01 18:22:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12746 states, 12745 states have (on average 3.6000784621420165) internal successors, (45883), 12745 states have internal predecessors, (45883), 0 states have call successors, (0), 0 states 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 18:22:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12746 states to 12746 states and 45883 transitions. [2022-03-01 18:22:07,733 INFO L78 Accepts]: Start accepts. Automaton has 12746 states and 45883 transitions. Word has length 28 [2022-03-01 18:22:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:07,733 INFO L470 AbstractCegarLoop]: Abstraction has 12746 states and 45883 transitions. [2022-03-01 18:22:07,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 12746 states and 45883 transitions. [2022-03-01 18:22:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:07,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:07,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:07,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:07,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 18:22:07,963 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 846539570, now seen corresponding path program 105 times [2022-03-01 18:22:07,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:07,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376036930] [2022-03-01 18:22:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:08,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376036930] [2022-03-01 18:22:08,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376036930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673324167] [2022-03-01 18:22:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:22:08,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:08,276 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:08,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 18:22:08,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:22:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:08,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:22:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:08,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:08,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:08,645 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 47 treesize of output 35 [2022-03-01 18:22:08,647 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 18 [2022-03-01 18:22:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:08,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:08,701 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 18:22:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:08,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:09,322 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:09,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 81 [2022-03-01 18:22:09,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:09,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:09,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:09,530 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 45 treesize of output 40 [2022-03-01 18:22:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:09,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673324167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:09,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:09,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-01 18:22:09,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633305338] [2022-03-01 18:22:09,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:09,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:22:09,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:22:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:09,623 INFO L87 Difference]: Start difference. First operand 12746 states and 45883 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 18:22:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:13,306 INFO L93 Difference]: Finished difference Result 21962 states and 76540 transitions. [2022-03-01 18:22:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:22:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 28 [2022-03-01 18:22:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:13,362 INFO L225 Difference]: With dead ends: 21962 [2022-03-01 18:22:13,362 INFO L226 Difference]: Without dead ends: 21922 [2022-03-01 18:22:13,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=705, Invalid=5301, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:22:13,363 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 352 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2910 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:13,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 618 Invalid, 3739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2910 Invalid, 0 Unknown, 739 Unchecked, 1.3s Time] [2022-03-01 18:22:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21922 states. [2022-03-01 18:22:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21922 to 12766. [2022-03-01 18:22:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.5993732863298082) internal successors, (45946), 12765 states have internal predecessors, (45946), 0 states have call successors, (0), 0 states 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 18:22:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45946 transitions. [2022-03-01 18:22:13,769 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45946 transitions. Word has length 28 [2022-03-01 18:22:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:13,769 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45946 transitions. [2022-03-01 18:22:13,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 18:22:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45946 transitions. [2022-03-01 18:22:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:13,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:13,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:13,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:14,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 18:22:14,008 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1094093886, now seen corresponding path program 106 times [2022-03-01 18:22:14,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:14,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683832629] [2022-03-01 18:22:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:14,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:14,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683832629] [2022-03-01 18:22:14,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683832629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:14,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322227191] [2022-03-01 18:22:14,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:22:14,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:14,220 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:14,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 18:22:14,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:22:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:14,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,533 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 40 treesize of output 30 [2022-03-01 18:22:14,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-03-01 18:22:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:14,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:14,748 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:14,748 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 58 [2022-03-01 18:22:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:14,789 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 17 [2022-03-01 18:22:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,824 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:14,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:14,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:14,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322227191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:14,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:14,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:14,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208511145] [2022-03-01 18:22:14,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:14,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:14,913 INFO L87 Difference]: Start difference. First operand 12766 states and 45946 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:15,675 INFO L93 Difference]: Finished difference Result 15546 states and 55206 transitions. [2022-03-01 18:22:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:22:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:15,717 INFO L225 Difference]: With dead ends: 15546 [2022-03-01 18:22:15,717 INFO L226 Difference]: Without dead ends: 15536 [2022-03-01 18:22:15,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:15,717 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:15,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 300 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:22:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2022-03-01 18:22:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 12722. [2022-03-01 18:22:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12722 states, 12721 states have (on average 3.6019966983727696) internal successors, (45821), 12721 states have internal predecessors, (45821), 0 states have call successors, (0), 0 states 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 18:22:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12722 states to 12722 states and 45821 transitions. [2022-03-01 18:22:16,042 INFO L78 Accepts]: Start accepts. Automaton has 12722 states and 45821 transitions. Word has length 28 [2022-03-01 18:22:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 12722 states and 45821 transitions. [2022-03-01 18:22:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 12722 states and 45821 transitions. [2022-03-01 18:22:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:16,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:16,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:16,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 18:22:16,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:16,269 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1390021678, now seen corresponding path program 107 times [2022-03-01 18:22:16,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:16,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63821028] [2022-03-01 18:22:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:16,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:16,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63821028] [2022-03-01 18:22:16,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63821028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:16,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124676503] [2022-03-01 18:22:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:22:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:16,423 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:16,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 18:22:16,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:22:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:16,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:16,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:22:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,763 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 41 treesize of output 29 [2022-03-01 18:22:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:16,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:16,886 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:16,886 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 58 [2022-03-01 18:22:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:16,919 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 17 [2022-03-01 18:22:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,952 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:16,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:16,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:16,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:17,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124676503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:17,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:17,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:17,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507806082] [2022-03-01 18:22:17,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:17,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:17,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:17,029 INFO L87 Difference]: Start difference. First operand 12722 states and 45821 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:17,500 INFO L93 Difference]: Finished difference Result 15516 states and 55159 transitions. [2022-03-01 18:22:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:22:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:17,542 INFO L225 Difference]: With dead ends: 15516 [2022-03-01 18:22:17,542 INFO L226 Difference]: Without dead ends: 15402 [2022-03-01 18:22:17,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:17,543 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:17,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 198 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 685 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-03-01 18:22:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15402 states. [2022-03-01 18:22:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15402 to 12766. [2022-03-01 18:22:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.599294947121034) internal successors, (45945), 12765 states have internal predecessors, (45945), 0 states have call successors, (0), 0 states 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 18:22:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45945 transitions. [2022-03-01 18:22:17,798 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45945 transitions. Word has length 28 [2022-03-01 18:22:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:17,798 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45945 transitions. [2022-03-01 18:22:17,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45945 transitions. [2022-03-01 18:22:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:17,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:17,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:17,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-01 18:22:18,031 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash -261021852, now seen corresponding path program 108 times [2022-03-01 18:22:18,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:18,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351681232] [2022-03-01 18:22:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:18,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:18,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351681232] [2022-03-01 18:22:18,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351681232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:18,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708388268] [2022-03-01 18:22:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:22:18,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:18,246 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:18,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 18:22:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:22:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:18,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:18,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-01 18:22:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:18,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:18,812 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 37 treesize of output 25 [2022-03-01 18:22:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:18,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:18,985 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:18,985 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 58 [2022-03-01 18:22:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:19,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:19,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-01 18:22:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:19,084 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:19,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:19,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:19,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:19,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708388268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:19,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:19,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:19,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410168836] [2022-03-01 18:22:19,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:19,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:19,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:19,184 INFO L87 Difference]: Start difference. First operand 12766 states and 45945 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:22:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:19,547 INFO L93 Difference]: Finished difference Result 12892 states and 46275 transitions. [2022-03-01 18:22:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:22:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:22:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:19,577 INFO L225 Difference]: With dead ends: 12892 [2022-03-01 18:22:19,577 INFO L226 Difference]: Without dead ends: 12835 [2022-03-01 18:22:19,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:22:19,579 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:19,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 135 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 450 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-03-01 18:22:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-03-01 18:22:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12771. [2022-03-01 18:22:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 3.6) internal successors, (45972), 12770 states have internal predecessors, (45972), 0 states have call successors, (0), 0 states 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 18:22:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 45972 transitions. [2022-03-01 18:22:19,796 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 45972 transitions. Word has length 28 [2022-03-01 18:22:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:19,796 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 45972 transitions. [2022-03-01 18:22:19,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:22:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 45972 transitions. [2022-03-01 18:22:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:19,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:19,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:19,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 18:22:20,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-01 18:22:20,031 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 927005792, now seen corresponding path program 109 times [2022-03-01 18:22:20,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:20,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463351837] [2022-03-01 18:22:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:20,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:20,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463351837] [2022-03-01 18:22:20,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463351837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:20,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353528338] [2022-03-01 18:22:20,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:20,265 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:20,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 18:22:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:20,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:20,762 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 24 treesize of output 20 [2022-03-01 18:22:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:20,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:20,766 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 39 treesize of output 27 [2022-03-01 18:22:20,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:22:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:20,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:20,943 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:20,943 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 58 [2022-03-01 18:22:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:21,009 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 17 [2022-03-01 18:22:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:21,054 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:21,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:21,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:21,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:21,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:21,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353528338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:21,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:21,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:21,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24798858] [2022-03-01 18:22:21,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:21,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:21,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:21,169 INFO L87 Difference]: Start difference. First operand 12771 states and 45972 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:21,652 INFO L93 Difference]: Finished difference Result 15517 states and 55172 transitions. [2022-03-01 18:22:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:22:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:21,756 INFO L225 Difference]: With dead ends: 15517 [2022-03-01 18:22:21,756 INFO L226 Difference]: Without dead ends: 15390 [2022-03-01 18:22:21,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:21,756 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:21,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 175 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 624 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-03-01 18:22:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2022-03-01 18:22:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 12763. [2022-03-01 18:22:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12763 states, 12762 states have (on average 3.600376116596145) internal successors, (45948), 12762 states have internal predecessors, (45948), 0 states have call successors, (0), 0 states 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 18:22:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12763 states to 12763 states and 45948 transitions. [2022-03-01 18:22:21,989 INFO L78 Accepts]: Start accepts. Automaton has 12763 states and 45948 transitions. Word has length 28 [2022-03-01 18:22:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:21,989 INFO L470 AbstractCegarLoop]: Abstraction has 12763 states and 45948 transitions. [2022-03-01 18:22:21,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12763 states and 45948 transitions. [2022-03-01 18:22:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:22,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:22,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:22,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 18:22:22,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-01 18:22:22,229 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 130437102, now seen corresponding path program 110 times [2022-03-01 18:22:22,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:22,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845159116] [2022-03-01 18:22:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:22,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:22,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845159116] [2022-03-01 18:22:22,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845159116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:22,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781655048] [2022-03-01 18:22:22,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:22,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:22,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:22,434 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:22,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 18:22:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:22,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:22,703 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 24 treesize of output 20 [2022-03-01 18:22:22,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-03-01 18:22:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:22,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:22,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:22:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:22,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:22,932 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:22,932 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 58 [2022-03-01 18:22:22,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:22,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:22,981 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 17 [2022-03-01 18:22:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,026 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:23,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:23,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:23,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781655048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:23,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:23,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:23,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960137717] [2022-03-01 18:22:23,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:23,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:23,143 INFO L87 Difference]: Start difference. First operand 12763 states and 45948 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:23,647 INFO L93 Difference]: Finished difference Result 13020 states and 46636 transitions. [2022-03-01 18:22:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:22:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:23,679 INFO L225 Difference]: With dead ends: 13020 [2022-03-01 18:22:23,679 INFO L226 Difference]: Without dead ends: 13005 [2022-03-01 18:22:23,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:23,679 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:23,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 228 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:22:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13005 states. [2022-03-01 18:22:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13005 to 12778. [2022-03-01 18:22:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 3.600219143773969) internal successors, (46000), 12777 states have internal predecessors, (46000), 0 states have call successors, (0), 0 states 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 18:22:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 46000 transitions. [2022-03-01 18:22:23,899 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 46000 transitions. Word has length 28 [2022-03-01 18:22:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:23,899 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 46000 transitions. [2022-03-01 18:22:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 46000 transitions. [2022-03-01 18:22:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:23,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:23,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:23,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 18:22:24,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-01 18:22:24,135 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1117928714, now seen corresponding path program 111 times [2022-03-01 18:22:24,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:24,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310662009] [2022-03-01 18:22:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:24,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:24,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310662009] [2022-03-01 18:22:24,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310662009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:24,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14759303] [2022-03-01 18:22:24,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:22:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:24,385 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:24,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 18:22:24,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:22:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:24,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:22:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:24,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:24,728 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 31 treesize of output 27 [2022-03-01 18:22:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:24,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:24,777 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 43 treesize of output 47 [2022-03-01 18:22:24,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:24,916 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 77 treesize of output 85 [2022-03-01 18:22:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:25,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:25,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:25,810 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 56 treesize of output 89 [2022-03-01 18:22:26,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:26,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:26,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:26,239 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 68 treesize of output 63 [2022-03-01 18:22:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:26,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14759303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:26,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:26,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-01 18:22:26,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375798403] [2022-03-01 18:22:26,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:26,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:22:26,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:22:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:22:26,365 INFO L87 Difference]: Start difference. First operand 12778 states and 46000 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:31,399 INFO L93 Difference]: Finished difference Result 24537 states and 86650 transitions. [2022-03-01 18:22:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:22:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:31,464 INFO L225 Difference]: With dead ends: 24537 [2022-03-01 18:22:31,464 INFO L226 Difference]: Without dead ends: 24488 [2022-03-01 18:22:31,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1193, Invalid=7737, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 18:22:31,465 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 302 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1883 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:31,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 479 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1537 Invalid, 0 Unknown, 1883 Unchecked, 0.7s Time] [2022-03-01 18:22:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24488 states. [2022-03-01 18:22:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24488 to 12960. [2022-03-01 18:22:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.6002777992129023) internal successors, (46656), 12959 states have internal predecessors, (46656), 0 states have call successors, (0), 0 states 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 18:22:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46656 transitions. [2022-03-01 18:22:31,796 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46656 transitions. Word has length 28 [2022-03-01 18:22:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:31,796 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46656 transitions. [2022-03-01 18:22:31,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46656 transitions. [2022-03-01 18:22:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:31,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:31,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:31,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:32,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:32,035 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1141828628, now seen corresponding path program 112 times [2022-03-01 18:22:32,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:32,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661858443] [2022-03-01 18:22:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:32,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:32,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:32,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661858443] [2022-03-01 18:22:32,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661858443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:32,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790722543] [2022-03-01 18:22:32,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:22:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:32,252 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:32,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 18:22:32,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:22:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:32,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:32,597 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 24 treesize of output 20 [2022-03-01 18:22:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:32,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:32,632 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 39 treesize of output 27 [2022-03-01 18:22:32,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:22:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:32,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:32,853 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:32,854 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 58 [2022-03-01 18:22:32,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:32,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:32,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-03-01 18:22:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:32,956 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:32,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:22:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:33,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:33,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790722543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:33,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:33,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:33,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107950049] [2022-03-01 18:22:33,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:33,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:33,067 INFO L87 Difference]: Start difference. First operand 12960 states and 46656 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:33,481 INFO L93 Difference]: Finished difference Result 13228 states and 47355 transitions. [2022-03-01 18:22:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:22:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:33,515 INFO L225 Difference]: With dead ends: 13228 [2022-03-01 18:22:33,515 INFO L226 Difference]: Without dead ends: 13203 [2022-03-01 18:22:33,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:22:33,515 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:33,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 168 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:22:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13203 states. [2022-03-01 18:22:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13203 to 12925. [2022-03-01 18:22:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12925 states, 12924 states have (on average 3.6012844320643764) internal successors, (46543), 12924 states have internal predecessors, (46543), 0 states have call successors, (0), 0 states 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 18:22:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12925 states to 12925 states and 46543 transitions. [2022-03-01 18:22:33,760 INFO L78 Accepts]: Start accepts. Automaton has 12925 states and 46543 transitions. Word has length 28 [2022-03-01 18:22:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:33,760 INFO L470 AbstractCegarLoop]: Abstraction has 12925 states and 46543 transitions. [2022-03-01 18:22:33,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12925 states and 46543 transitions. [2022-03-01 18:22:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:33,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:33,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:33,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 18:22:33,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:33,995 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 938600134, now seen corresponding path program 113 times [2022-03-01 18:22:33,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:33,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226249635] [2022-03-01 18:22:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:34,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:34,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226249635] [2022-03-01 18:22:34,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226249635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:34,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030416385] [2022-03-01 18:22:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:22:34,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:34,171 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:34,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 18:22:34,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:22:34,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:22:34,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:34,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:34,594 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 24 treesize of output 20 [2022-03-01 18:22:34,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 18:22:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:34,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,599 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 36 treesize of output 24 [2022-03-01 18:22:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:34,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:34,762 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:34,762 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 58 [2022-03-01 18:22:34,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:34,821 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 17 [2022-03-01 18:22:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,862 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:34,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:34,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:34,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:34,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030416385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:34,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:34,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:34,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76145931] [2022-03-01 18:22:34,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:34,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:34,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:34,976 INFO L87 Difference]: Start difference. First operand 12925 states and 46543 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:22:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:35,656 INFO L93 Difference]: Finished difference Result 16208 states and 57298 transitions. [2022-03-01 18:22:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:22:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:22:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:35,695 INFO L225 Difference]: With dead ends: 16208 [2022-03-01 18:22:35,695 INFO L226 Difference]: Without dead ends: 16183 [2022-03-01 18:22:35,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:35,695 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:35,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 343 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 229 Unchecked, 0.3s Time] [2022-03-01 18:22:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16183 states. [2022-03-01 18:22:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16183 to 12943. [2022-03-01 18:22:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 3.600216349868645) internal successors, (46594), 12942 states have internal predecessors, (46594), 0 states have call successors, (0), 0 states 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 18:22:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 46594 transitions. [2022-03-01 18:22:35,980 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 46594 transitions. Word has length 28 [2022-03-01 18:22:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:35,980 INFO L470 AbstractCegarLoop]: Abstraction has 12943 states and 46594 transitions. [2022-03-01 18:22:35,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:22:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 46594 transitions. [2022-03-01 18:22:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:36,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:36,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:36,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 18:22:36,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 18:22:36,212 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2009236406, now seen corresponding path program 114 times [2022-03-01 18:22:36,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:36,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099215695] [2022-03-01 18:22:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:36,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:36,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099215695] [2022-03-01 18:22:36,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099215695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:36,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117503321] [2022-03-01 18:22:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:22:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:36,405 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:36,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 18:22:36,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:22:36,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:36,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:36,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:22:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:36,853 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 41 treesize of output 29 [2022-03-01 18:22:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:36,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:37,034 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:37,035 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 58 [2022-03-01 18:22:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:37,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:22:37,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:37,134 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:37,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:37,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:37,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:37,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117503321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:37,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:37,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:37,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471953797] [2022-03-01 18:22:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:37,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:37,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:37,270 INFO L87 Difference]: Start difference. First operand 12943 states and 46594 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:22:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:37,999 INFO L93 Difference]: Finished difference Result 16199 states and 57265 transitions. [2022-03-01 18:22:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:22:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:22:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:38,041 INFO L225 Difference]: With dead ends: 16199 [2022-03-01 18:22:38,042 INFO L226 Difference]: Without dead ends: 16174 [2022-03-01 18:22:38,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:38,042 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:38,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 396 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 398 Unchecked, 0.3s Time] [2022-03-01 18:22:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2022-03-01 18:22:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 12970. [2022-03-01 18:22:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12969 states have (on average 3.597733055748323) internal successors, (46659), 12969 states have internal predecessors, (46659), 0 states have call successors, (0), 0 states 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 18:22:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 46659 transitions. [2022-03-01 18:22:38,389 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 46659 transitions. Word has length 28 [2022-03-01 18:22:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:38,389 INFO L470 AbstractCegarLoop]: Abstraction has 12970 states and 46659 transitions. [2022-03-01 18:22:38,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:22:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 46659 transitions. [2022-03-01 18:22:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:38,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:38,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:38,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:38,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 18:22:38,632 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1701544062, now seen corresponding path program 115 times [2022-03-01 18:22:38,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:38,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860808726] [2022-03-01 18:22:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:38,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:38,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860808726] [2022-03-01 18:22:38,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860808726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:38,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407058892] [2022-03-01 18:22:38,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:38,833 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:38,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 18:22:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:39,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:39,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-01 18:22:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:39,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:22:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:39,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:39,472 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:39,472 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 58 [2022-03-01 18:22:39,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:39,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-01 18:22:39,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,551 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:39,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:39,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:39,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407058892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:39,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:39,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:39,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544267299] [2022-03-01 18:22:39,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:39,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:39,638 INFO L87 Difference]: Start difference. First operand 12970 states and 46659 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:22:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:40,211 INFO L93 Difference]: Finished difference Result 16065 states and 56911 transitions. [2022-03-01 18:22:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:22:40,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:22:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:40,253 INFO L225 Difference]: With dead ends: 16065 [2022-03-01 18:22:40,254 INFO L226 Difference]: Without dead ends: 16056 [2022-03-01 18:22:40,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:40,256 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:40,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 371 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 732 Invalid, 0 Unknown, 363 Unchecked, 0.2s Time] [2022-03-01 18:22:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2022-03-01 18:22:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 12938. [2022-03-01 18:22:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.599907242791992) internal successors, (46572), 12937 states have internal predecessors, (46572), 0 states have call successors, (0), 0 states 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 18:22:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 46572 transitions. [2022-03-01 18:22:40,519 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 46572 transitions. Word has length 28 [2022-03-01 18:22:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:40,520 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 46572 transitions. [2022-03-01 18:22:40,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:22:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 46572 transitions. [2022-03-01 18:22:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:40,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:40,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:40,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:40,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 18:22:40,760 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 107172430, now seen corresponding path program 116 times [2022-03-01 18:22:40,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:40,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436764585] [2022-03-01 18:22:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:40,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:40,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436764585] [2022-03-01 18:22:40,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436764585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:40,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470530559] [2022-03-01 18:22:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:40,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:40,916 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:40,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 18:22:40,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:40,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:41,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:41,245 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 31 treesize of output 27 [2022-03-01 18:22:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:41,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,247 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 43 treesize of output 31 [2022-03-01 18:22:41,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:22:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:41,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:41,389 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:41,389 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 58 [2022-03-01 18:22:41,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:41,422 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 34 treesize of output 18 [2022-03-01 18:22:41,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,453 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:41,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:22:41,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:41,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:41,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470530559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:41,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:41,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:41,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357937342] [2022-03-01 18:22:41,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:41,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:41,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:41,525 INFO L87 Difference]: Start difference. First operand 12938 states and 46572 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:42,062 INFO L93 Difference]: Finished difference Result 15989 states and 56727 transitions. [2022-03-01 18:22:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:22:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:42,106 INFO L225 Difference]: With dead ends: 15989 [2022-03-01 18:22:42,106 INFO L226 Difference]: Without dead ends: 15964 [2022-03-01 18:22:42,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:42,106 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:42,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 297 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 825 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-03-01 18:22:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15964 states. [2022-03-01 18:22:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15964 to 12928. [2022-03-01 18:22:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12928 states, 12927 states have (on average 3.6002939583816818) internal successors, (46541), 12927 states have internal predecessors, (46541), 0 states have call successors, (0), 0 states 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 18:22:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12928 states to 12928 states and 46541 transitions. [2022-03-01 18:22:42,381 INFO L78 Accepts]: Start accepts. Automaton has 12928 states and 46541 transitions. Word has length 28 [2022-03-01 18:22:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:42,381 INFO L470 AbstractCegarLoop]: Abstraction has 12928 states and 46541 transitions. [2022-03-01 18:22:42,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12928 states and 46541 transitions. [2022-03-01 18:22:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:42,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:42,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:42,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 18:22:42,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 18:22:42,617 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1755677898, now seen corresponding path program 117 times [2022-03-01 18:22:42,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:42,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095538139] [2022-03-01 18:22:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:42,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:42,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095538139] [2022-03-01 18:22:42,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095538139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:42,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189730377] [2022-03-01 18:22:42,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:22:42,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:42,837 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:42,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 18:22:42,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:22:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:42,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:22:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:43,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:43,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:43,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-03-01 18:22:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:43,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:43,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-01 18:22:43,451 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 27 treesize of output 23 [2022-03-01 18:22:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:43,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:44,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:44,080 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 20 [2022-03-01 18:22:44,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 18:22:44,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:44,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:22:44,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:22:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:44,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189730377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:44,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:44,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-03-01 18:22:44,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669480947] [2022-03-01 18:22:44,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:44,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:22:44,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:22:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:22:44,234 INFO L87 Difference]: Start difference. First operand 12928 states and 46541 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 18:22:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:47,605 INFO L93 Difference]: Finished difference Result 27708 states and 96022 transitions. [2022-03-01 18:22:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 18:22:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 28 [2022-03-01 18:22:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:47,681 INFO L225 Difference]: With dead ends: 27708 [2022-03-01 18:22:47,681 INFO L226 Difference]: Without dead ends: 27582 [2022-03-01 18:22:47,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1289, Invalid=8413, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 18:22:47,683 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 284 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:47,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 582 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1154 Invalid, 0 Unknown, 1294 Unchecked, 0.6s Time] [2022-03-01 18:22:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2022-03-01 18:22:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 12960. [2022-03-01 18:22:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.598888803148391) internal successors, (46638), 12959 states have internal predecessors, (46638), 0 states have call successors, (0), 0 states 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 18:22:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46638 transitions. [2022-03-01 18:22:48,109 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46638 transitions. Word has length 28 [2022-03-01 18:22:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:48,110 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46638 transitions. [2022-03-01 18:22:48,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 18:22:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46638 transitions. [2022-03-01 18:22:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:48,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:48,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:48,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 18:22:48,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-01 18:22:48,349 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1587868806, now seen corresponding path program 118 times [2022-03-01 18:22:48,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:48,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152913449] [2022-03-01 18:22:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:48,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:48,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152913449] [2022-03-01 18:22:48,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152913449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:48,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908162364] [2022-03-01 18:22:48,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:22:48,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:48,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:48,606 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 18:22:48,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:22:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:48,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:49,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:22:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:22:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:49,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:49,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:49,224 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 58 [2022-03-01 18:22:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:49,268 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 34 treesize of output 18 [2022-03-01 18:22:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,302 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:49,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:22:49,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:49,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:49,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:49,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908162364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:49,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:49,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:49,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903176969] [2022-03-01 18:22:49,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:49,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:49,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:49,395 INFO L87 Difference]: Start difference. First operand 12960 states and 46638 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:50,020 INFO L93 Difference]: Finished difference Result 16858 states and 59788 transitions. [2022-03-01 18:22:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:22:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:50,073 INFO L225 Difference]: With dead ends: 16858 [2022-03-01 18:22:50,074 INFO L226 Difference]: Without dead ends: 16772 [2022-03-01 18:22:50,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:22:50,076 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:50,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 180 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 663 Invalid, 0 Unknown, 259 Unchecked, 0.2s Time] [2022-03-01 18:22:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16772 states. [2022-03-01 18:22:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16772 to 12965. [2022-03-01 18:22:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.5990435050910214) internal successors, (46658), 12964 states have internal predecessors, (46658), 0 states have call successors, (0), 0 states 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 18:22:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 46658 transitions. [2022-03-01 18:22:50,376 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 46658 transitions. Word has length 28 [2022-03-01 18:22:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:50,376 INFO L470 AbstractCegarLoop]: Abstraction has 12965 states and 46658 transitions. [2022-03-01 18:22:50,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 46658 transitions. [2022-03-01 18:22:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:50,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:50,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:50,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:50,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 18:22:50,610 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1332985644, now seen corresponding path program 119 times [2022-03-01 18:22:50,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:50,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194711505] [2022-03-01 18:22:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:50,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:50,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:50,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194711505] [2022-03-01 18:22:50,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194711505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:50,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418483127] [2022-03-01 18:22:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:22:50,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:50,843 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:50,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 18:22:50,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:22:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:51,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:22:51,383 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 24 treesize of output 20 [2022-03-01 18:22:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:51,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,386 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 34 treesize of output 22 [2022-03-01 18:22:51,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-01 18:22:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:51,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:51,515 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:51,515 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 58 [2022-03-01 18:22:51,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:51,564 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 17 [2022-03-01 18:22:51,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,597 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:51,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:22:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:51,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:51,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:51,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418483127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:51,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:51,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:22:51,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699813915] [2022-03-01 18:22:51,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:51,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:22:51,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:51,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:22:51,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:22:51,679 INFO L87 Difference]: Start difference. First operand 12965 states and 46658 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:52,164 INFO L93 Difference]: Finished difference Result 15799 states and 56125 transitions. [2022-03-01 18:22:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:22:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:52,202 INFO L225 Difference]: With dead ends: 15799 [2022-03-01 18:22:52,202 INFO L226 Difference]: Without dead ends: 15665 [2022-03-01 18:22:52,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:52,202 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:52,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 157 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-03-01 18:22:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15665 states. [2022-03-01 18:22:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15665 to 12889. [2022-03-01 18:22:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12889 states, 12888 states have (on average 3.6007914338919926) internal successors, (46407), 12888 states have internal predecessors, (46407), 0 states have call successors, (0), 0 states 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 18:22:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12889 states to 12889 states and 46407 transitions. [2022-03-01 18:22:52,443 INFO L78 Accepts]: Start accepts. Automaton has 12889 states and 46407 transitions. Word has length 28 [2022-03-01 18:22:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:52,443 INFO L470 AbstractCegarLoop]: Abstraction has 12889 states and 46407 transitions. [2022-03-01 18:22:52,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 12889 states and 46407 transitions. [2022-03-01 18:22:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:52,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:52,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:52,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:52,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:52,671 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 177393772, now seen corresponding path program 120 times [2022-03-01 18:22:52,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:52,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781957483] [2022-03-01 18:22:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:52,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:52,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:52,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781957483] [2022-03-01 18:22:52,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781957483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:52,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754207480] [2022-03-01 18:22:52,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:22:52,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:52,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:52,895 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:52,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 18:22:52,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:22:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:22:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:53,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:53,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:53,504 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 42 treesize of output 46 [2022-03-01 18:22:53,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:53,515 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 78 treesize of output 80 [2022-03-01 18:22:53,519 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 62 treesize of output 52 [2022-03-01 18:22:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:53,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:54,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:54,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:54,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-03-01 18:22:54,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:54,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:54,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:54,537 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 60 treesize of output 77 [2022-03-01 18:22:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:54,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754207480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:54,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:54,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:22:54,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539563802] [2022-03-01 18:22:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:54,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:22:54,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:22:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:22:54,850 INFO L87 Difference]: Start difference. First operand 12889 states and 46407 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:57,602 INFO L93 Difference]: Finished difference Result 20867 states and 72987 transitions. [2022-03-01 18:22:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:22:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:57,660 INFO L225 Difference]: With dead ends: 20867 [2022-03-01 18:22:57,660 INFO L226 Difference]: Without dead ends: 20781 [2022-03-01 18:22:57,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=791, Invalid=6015, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:22:57,661 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2286 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:57,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 448 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 816 Invalid, 0 Unknown, 2286 Unchecked, 0.3s Time] [2022-03-01 18:22:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-03-01 18:22:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 13053. [2022-03-01 18:22:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13053 states, 13052 states have (on average 3.5927827152926755) internal successors, (46893), 13052 states have internal predecessors, (46893), 0 states have call successors, (0), 0 states 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 18:22:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13053 states to 13053 states and 46893 transitions. [2022-03-01 18:22:58,077 INFO L78 Accepts]: Start accepts. Automaton has 13053 states and 46893 transitions. Word has length 28 [2022-03-01 18:22:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 13053 states and 46893 transitions. [2022-03-01 18:22:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 13053 states and 46893 transitions. [2022-03-01 18:22:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:22:58,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:58,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:58,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 18:22:58,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:58,319 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1021488582, now seen corresponding path program 121 times [2022-03-01 18:22:58,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:58,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269628591] [2022-03-01 18:22:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:58,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:58,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269628591] [2022-03-01 18:22:58,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269628591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:58,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262113286] [2022-03-01 18:22:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:22:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:58,609 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:58,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 18:22:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:22:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:58,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:22:58,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-01 18:22:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:58,964 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 41 treesize of output 29 [2022-03-01 18:22:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:59,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:59,154 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:59,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-01 18:22:59,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:59,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:59,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:59,213 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 34 treesize of output 18 [2022-03-01 18:22:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:59,264 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:22:59,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:22:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:59,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:59,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262113286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:59,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:59,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:22:59,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372774469] [2022-03-01 18:22:59,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:59,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:22:59,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:22:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:22:59,392 INFO L87 Difference]: Start difference. First operand 13053 states and 46893 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:59,867 INFO L93 Difference]: Finished difference Result 17382 states and 61295 transitions. [2022-03-01 18:22:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:22:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:22:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:59,909 INFO L225 Difference]: With dead ends: 17382 [2022-03-01 18:22:59,909 INFO L226 Difference]: Without dead ends: 17339 [2022-03-01 18:22:59,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:22:59,910 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:59,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 214 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-01 18:22:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-03-01 18:23:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 13148. [2022-03-01 18:23:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 13147 states have (on average 3.5892599072031643) internal successors, (47188), 13147 states have internal predecessors, (47188), 0 states have call successors, (0), 0 states 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 18:23:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 47188 transitions. [2022-03-01 18:23:00,245 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 47188 transitions. Word has length 28 [2022-03-01 18:23:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 13148 states and 47188 transitions. [2022-03-01 18:23:00,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 47188 transitions. [2022-03-01 18:23:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:00,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:00,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:00,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-01 18:23:00,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:00,485 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:00,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1270364268, now seen corresponding path program 122 times [2022-03-01 18:23:00,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:00,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737886368] [2022-03-01 18:23:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:00,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:00,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737886368] [2022-03-01 18:23:00,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737886368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:00,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605965944] [2022-03-01 18:23:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:00,702 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:00,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 18:23:00,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:23:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:01,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:01,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:01,322 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 42 treesize of output 46 [2022-03-01 18:23:01,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:01,334 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 83 treesize of output 85 [2022-03-01 18:23:01,338 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 59 treesize of output 49 [2022-03-01 18:23:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:01,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:01,821 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:23:01,822 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 60 treesize of output 85 [2022-03-01 18:23:02,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:02,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:02,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:02,267 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 60 treesize of output 77 [2022-03-01 18:23:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:02,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605965944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:02,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:02,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:23:02,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906381700] [2022-03-01 18:23:02,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:23:02,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:23:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:23:02,493 INFO L87 Difference]: Start difference. First operand 13148 states and 47188 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:04,631 INFO L93 Difference]: Finished difference Result 21637 states and 75420 transitions. [2022-03-01 18:23:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:23:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:04,683 INFO L225 Difference]: With dead ends: 21637 [2022-03-01 18:23:04,683 INFO L226 Difference]: Without dead ends: 21492 [2022-03-01 18:23:04,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:23:04,684 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 987 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:04,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 426 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 911 Invalid, 0 Unknown, 987 Unchecked, 0.4s Time] [2022-03-01 18:23:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21492 states. [2022-03-01 18:23:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21492 to 13298. [2022-03-01 18:23:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13298 states, 13297 states have (on average 3.590584342332857) internal successors, (47744), 13297 states have internal predecessors, (47744), 0 states have call successors, (0), 0 states 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 18:23:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13298 states to 13298 states and 47744 transitions. [2022-03-01 18:23:04,985 INFO L78 Accepts]: Start accepts. Automaton has 13298 states and 47744 transitions. Word has length 28 [2022-03-01 18:23:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:04,985 INFO L470 AbstractCegarLoop]: Abstraction has 13298 states and 47744 transitions. [2022-03-01 18:23:04,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13298 states and 47744 transitions. [2022-03-01 18:23:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:05,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:05,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:05,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:05,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:05,225 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1836575384, now seen corresponding path program 123 times [2022-03-01 18:23:05,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:05,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061071013] [2022-03-01 18:23:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:05,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:05,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061071013] [2022-03-01 18:23:05,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061071013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:05,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365862683] [2022-03-01 18:23:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:05,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:05,420 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 18:23:05,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:23:05,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:05,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:23:05,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:05,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:05,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:05,924 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 46 treesize of output 48 [2022-03-01 18:23:05,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:05,936 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 82 treesize of output 84 [2022-03-01 18:23:05,940 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 64 treesize of output 54 [2022-03-01 18:23:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:06,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:06,498 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:23:06,498 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 60 treesize of output 85 [2022-03-01 18:23:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:06,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:06,836 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 60 treesize of output 55 [2022-03-01 18:23:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:06,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365862683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:06,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:06,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-01 18:23:06,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639397554] [2022-03-01 18:23:06,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:06,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:23:06,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:06,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:23:06,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:23:06,996 INFO L87 Difference]: Start difference. First operand 13298 states and 47744 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:11,319 INFO L93 Difference]: Finished difference Result 29160 states and 100540 transitions. [2022-03-01 18:23:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 18:23:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:11,410 INFO L225 Difference]: With dead ends: 29160 [2022-03-01 18:23:11,410 INFO L226 Difference]: Without dead ends: 29001 [2022-03-01 18:23:11,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:23:11,412 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 257 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1515 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:11,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 655 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1681 Invalid, 0 Unknown, 1515 Unchecked, 0.9s Time] [2022-03-01 18:23:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29001 states. [2022-03-01 18:23:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29001 to 13334. [2022-03-01 18:23:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13334 states, 13333 states have (on average 3.59063976599415) internal successors, (47874), 13333 states have internal predecessors, (47874), 0 states have call successors, (0), 0 states 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 18:23:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13334 states to 13334 states and 47874 transitions. [2022-03-01 18:23:11,859 INFO L78 Accepts]: Start accepts. Automaton has 13334 states and 47874 transitions. Word has length 28 [2022-03-01 18:23:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:11,859 INFO L470 AbstractCegarLoop]: Abstraction has 13334 states and 47874 transitions. [2022-03-01 18:23:11,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 13334 states and 47874 transitions. [2022-03-01 18:23:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:11,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:11,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:11,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:12,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-01 18:23:12,098 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:12,099 INFO L85 PathProgramCache]: Analyzing trace with hash -195901830, now seen corresponding path program 124 times [2022-03-01 18:23:12,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:12,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825403002] [2022-03-01 18:23:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:12,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:12,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:12,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825403002] [2022-03-01 18:23:12,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825403002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:12,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899899683] [2022-03-01 18:23:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:12,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:12,302 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 18:23:12,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:12,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:12,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:12,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:23:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:23:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:12,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:12,819 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:12,819 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 58 [2022-03-01 18:23:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:12,880 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 34 treesize of output 18 [2022-03-01 18:23:12,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,925 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:12,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:12,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:12,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:13,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899899683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:13,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:13,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:13,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969193878] [2022-03-01 18:23:13,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:13,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:13,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:13,039 INFO L87 Difference]: Start difference. First operand 13334 states and 47874 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:13,890 INFO L93 Difference]: Finished difference Result 17565 states and 61968 transitions. [2022-03-01 18:23:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:23:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:13,941 INFO L225 Difference]: With dead ends: 17565 [2022-03-01 18:23:13,941 INFO L226 Difference]: Without dead ends: 17496 [2022-03-01 18:23:13,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:23:13,941 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:13,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 671 Invalid, 0 Unknown, 518 Unchecked, 0.3s Time] [2022-03-01 18:23:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17496 states. [2022-03-01 18:23:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17496 to 13197. [2022-03-01 18:23:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13197 states, 13196 states have (on average 3.5944225522885724) internal successors, (47432), 13196 states have internal predecessors, (47432), 0 states have call successors, (0), 0 states 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 18:23:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13197 states to 13197 states and 47432 transitions. [2022-03-01 18:23:14,236 INFO L78 Accepts]: Start accepts. Automaton has 13197 states and 47432 transitions. Word has length 28 [2022-03-01 18:23:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:14,236 INFO L470 AbstractCegarLoop]: Abstraction has 13197 states and 47432 transitions. [2022-03-01 18:23:14,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13197 states and 47432 transitions. [2022-03-01 18:23:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:14,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:14,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:14,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 18:23:14,475 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1874669942, now seen corresponding path program 125 times [2022-03-01 18:23:14,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:14,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517307482] [2022-03-01 18:23:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:14,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:14,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517307482] [2022-03-01 18:23:14,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517307482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:14,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655586321] [2022-03-01 18:23:14,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:14,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:14,731 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:14,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 18:23:14,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:23:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:23:14,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:15,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:15,197 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 24 treesize of output 20 [2022-03-01 18:23:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,200 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 34 treesize of output 22 [2022-03-01 18:23:15,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:15,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:15,360 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:15,361 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 30 treesize of output 55 [2022-03-01 18:23:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:15,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:23:15,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,489 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:15,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:15,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:15,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655586321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:15,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:15,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:15,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079819197] [2022-03-01 18:23:15,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:15,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:15,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:15,616 INFO L87 Difference]: Start difference. First operand 13197 states and 47432 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:23:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:16,186 INFO L93 Difference]: Finished difference Result 16308 states and 57849 transitions. [2022-03-01 18:23:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:23:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:23:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:16,227 INFO L225 Difference]: With dead ends: 16308 [2022-03-01 18:23:16,227 INFO L226 Difference]: Without dead ends: 16293 [2022-03-01 18:23:16,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:23:16,228 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 69 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:16,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 285 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 707 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-01 18:23:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2022-03-01 18:23:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 13256. [2022-03-01 18:23:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13255 states have (on average 3.593511882308563) internal successors, (47632), 13255 states have internal predecessors, (47632), 0 states have call successors, (0), 0 states 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 18:23:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 47632 transitions. [2022-03-01 18:23:16,496 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 47632 transitions. Word has length 28 [2022-03-01 18:23:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 47632 transitions. [2022-03-01 18:23:16,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:23:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 47632 transitions. [2022-03-01 18:23:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:16,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:16,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:16,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:16,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:16,736 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -527539186, now seen corresponding path program 126 times [2022-03-01 18:23:16,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:16,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605442000] [2022-03-01 18:23:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:16,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:16,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605442000] [2022-03-01 18:23:16,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605442000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:16,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773732063] [2022-03-01 18:23:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:16,941 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 18:23:16,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:23:16,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:17,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:17,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-01 18:23:17,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:17,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,407 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 37 treesize of output 25 [2022-03-01 18:23:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:17,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:17,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:17,549 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 30 treesize of output 55 [2022-03-01 18:23:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:17,611 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 30 treesize of output 14 [2022-03-01 18:23:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,680 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:17,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:17,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:17,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:17,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:17,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773732063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:17,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:17,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:17,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952688176] [2022-03-01 18:23:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:17,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:17,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:17,798 INFO L87 Difference]: Start difference. First operand 13256 states and 47632 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:23:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:18,423 INFO L93 Difference]: Finished difference Result 16326 states and 57916 transitions. [2022-03-01 18:23:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:23:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:23:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:18,464 INFO L225 Difference]: With dead ends: 16326 [2022-03-01 18:23:18,464 INFO L226 Difference]: Without dead ends: 16311 [2022-03-01 18:23:18,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:23:18,464 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:18,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 272 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 691 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2022-03-01 18:23:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2022-03-01 18:23:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 13234. [2022-03-01 18:23:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 0 states have call successors, (0), 0 states 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 18:23:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-03-01 18:23:18,729 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-03-01 18:23:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:18,729 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-03-01 18:23:18,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:23:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-03-01 18:23:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:18,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:18,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:18,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-01 18:23:18,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 18:23:18,970 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash 896549742, now seen corresponding path program 127 times [2022-03-01 18:23:18,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:18,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628052673] [2022-03-01 18:23:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:18,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:19,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:19,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628052673] [2022-03-01 18:23:19,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628052673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:19,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720392622] [2022-03-01 18:23:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:19,174 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:19,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 18:23:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:19,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:19,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-01 18:23:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:19,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,565 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 41 treesize of output 29 [2022-03-01 18:23:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:19,723 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:19,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-03-01 18:23:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:19,781 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 30 treesize of output 14 [2022-03-01 18:23:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,857 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:19,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:19,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:19,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720392622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:19,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:19,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:19,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022986801] [2022-03-01 18:23:19,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:19,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:19,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:19,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:19,974 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:23:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:20,414 INFO L93 Difference]: Finished difference Result 16304 states and 57804 transitions. [2022-03-01 18:23:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:23:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 28 [2022-03-01 18:23:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:20,464 INFO L225 Difference]: With dead ends: 16304 [2022-03-01 18:23:20,465 INFO L226 Difference]: Without dead ends: 16289 [2022-03-01 18:23:20,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:23:20,465 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:20,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 261 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 407 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-03-01 18:23:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16289 states. [2022-03-01 18:23:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16289 to 13260. [2022-03-01 18:23:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13259 states have (on average 3.5910702164567465) internal successors, (47614), 13259 states have internal predecessors, (47614), 0 states have call successors, (0), 0 states 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 18:23:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 47614 transitions. [2022-03-01 18:23:20,803 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 47614 transitions. Word has length 28 [2022-03-01 18:23:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:20,803 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 47614 transitions. [2022-03-01 18:23:20,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 18:23:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 47614 transitions. [2022-03-01 18:23:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:20,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:20,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:20,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 18:23:21,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 18:23:21,039 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2051286798, now seen corresponding path program 128 times [2022-03-01 18:23:21,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:21,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418665399] [2022-03-01 18:23:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:21,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418665399] [2022-03-01 18:23:21,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418665399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640396382] [2022-03-01 18:23:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:21,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:21,253 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:21,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 18:23:21,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:21,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:21,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:21,819 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 24 treesize of output 20 [2022-03-01 18:23:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:21,823 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 34 treesize of output 22 [2022-03-01 18:23:21,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:21,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:21,985 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:21,985 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 30 treesize of output 55 [2022-03-01 18:23:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:22,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:23:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:22,128 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:22,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:22,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:22,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640396382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:22,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:22,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:22,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715298929] [2022-03-01 18:23:22,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:22,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:22,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:22,246 INFO L87 Difference]: Start difference. First operand 13260 states and 47614 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:23:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:22,848 INFO L93 Difference]: Finished difference Result 16450 states and 58205 transitions. [2022-03-01 18:23:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:23:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 28 [2022-03-01 18:23:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:22,898 INFO L225 Difference]: With dead ends: 16450 [2022-03-01 18:23:22,898 INFO L226 Difference]: Without dead ends: 16435 [2022-03-01 18:23:22,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:23:22,898 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:22,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 276 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 762 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-03-01 18:23:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16435 states. [2022-03-01 18:23:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16435 to 13282. [2022-03-01 18:23:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 3.5894134477825466) internal successors, (47671), 13281 states have internal predecessors, (47671), 0 states have call successors, (0), 0 states 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 18:23:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 47671 transitions. [2022-03-01 18:23:23,189 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 47671 transitions. Word has length 28 [2022-03-01 18:23:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:23,189 INFO L470 AbstractCegarLoop]: Abstraction has 13282 states and 47671 transitions. [2022-03-01 18:23:23,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 18:23:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 47671 transitions. [2022-03-01 18:23:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:23,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:23,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:23,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 18:23:23,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:23,428 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1354025700, now seen corresponding path program 129 times [2022-03-01 18:23:23,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:23,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918789395] [2022-03-01 18:23:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:23,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:23,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918789395] [2022-03-01 18:23:23,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918789395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:23,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997191618] [2022-03-01 18:23:23,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:23,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:23,630 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:23,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 18:23:23,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:23:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:24,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:24,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:23:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,140 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 37 treesize of output 25 [2022-03-01 18:23:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:24,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:24,294 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:24,295 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 30 treesize of output 55 [2022-03-01 18:23:24,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:23:24,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,394 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:24,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:24,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997191618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:24,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:24,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:24,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346581016] [2022-03-01 18:23:24,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:24,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:24,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:24,476 INFO L87 Difference]: Start difference. First operand 13282 states and 47671 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:23:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:24,866 INFO L93 Difference]: Finished difference Result 16320 states and 57838 transitions. [2022-03-01 18:23:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:23:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:23:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:24,906 INFO L225 Difference]: With dead ends: 16320 [2022-03-01 18:23:24,906 INFO L226 Difference]: Without dead ends: 16313 [2022-03-01 18:23:24,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:23:24,907 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:24,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 228 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 563 Invalid, 0 Unknown, 367 Unchecked, 0.2s Time] [2022-03-01 18:23:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2022-03-01 18:23:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 13234. [2022-03-01 18:23:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 0 states have call successors, (0), 0 states 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 18:23:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-03-01 18:23:25,236 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-03-01 18:23:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:25,236 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-03-01 18:23:25,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:23:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-03-01 18:23:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:25,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:25,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:25,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:25,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:25,480 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -571975410, now seen corresponding path program 130 times [2022-03-01 18:23:25,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:25,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718991181] [2022-03-01 18:23:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:25,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:25,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718991181] [2022-03-01 18:23:25,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718991181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:25,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147444267] [2022-03-01 18:23:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:25,617 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:25,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 18:23:25,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:25,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:25,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-01 18:23:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,978 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 37 treesize of output 25 [2022-03-01 18:23:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:26,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:26,086 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 30 treesize of output 55 [2022-03-01 18:23:26,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:26,124 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 30 treesize of output 14 [2022-03-01 18:23:26,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,179 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:26,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:26,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:26,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:26,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147444267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:26,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:26,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:26,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125063144] [2022-03-01 18:23:26,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:26,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:26,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:26,255 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:23:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:26,558 INFO L93 Difference]: Finished difference Result 16234 states and 57608 transitions. [2022-03-01 18:23:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:23:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 28 [2022-03-01 18:23:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:26,601 INFO L225 Difference]: With dead ends: 16234 [2022-03-01 18:23:26,601 INFO L226 Difference]: Without dead ends: 16194 [2022-03-01 18:23:26,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:23:26,601 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:26,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-01 18:23:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16194 states. [2022-03-01 18:23:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16194 to 13255. [2022-03-01 18:23:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13254 states have (on average 3.5926512750867663) internal successors, (47617), 13254 states have internal predecessors, (47617), 0 states have call successors, (0), 0 states 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 18:23:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 47617 transitions. [2022-03-01 18:23:26,884 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 47617 transitions. Word has length 28 [2022-03-01 18:23:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:26,884 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 47617 transitions. [2022-03-01 18:23:26,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:23:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 47617 transitions. [2022-03-01 18:23:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:26,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:26,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:26,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:27,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-01 18:23:27,128 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash -429594712, now seen corresponding path program 131 times [2022-03-01 18:23:27,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:27,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101936942] [2022-03-01 18:23:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:27,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:27,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101936942] [2022-03-01 18:23:27,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101936942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:27,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136831613] [2022-03-01 18:23:27,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:27,304 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:27,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 18:23:27,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:23:27,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:27,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:27,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-01 18:23:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:27,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:27,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:23:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:27,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:27,876 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:27,877 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 30 treesize of output 55 [2022-03-01 18:23:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:28,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-03-01 18:23:28,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,109 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:28,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:28,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:28,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:28,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136831613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:28,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:28,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:28,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653135694] [2022-03-01 18:23:28,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:28,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:28,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:28,234 INFO L87 Difference]: Start difference. First operand 13255 states and 47617 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:23:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:28,673 INFO L93 Difference]: Finished difference Result 16228 states and 57590 transitions. [2022-03-01 18:23:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:23:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 28 [2022-03-01 18:23:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:28,712 INFO L225 Difference]: With dead ends: 16228 [2022-03-01 18:23:28,712 INFO L226 Difference]: Without dead ends: 16188 [2022-03-01 18:23:28,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:23:28,713 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:28,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 265 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 556 Invalid, 0 Unknown, 364 Unchecked, 0.3s Time] [2022-03-01 18:23:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2022-03-01 18:23:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 13252. [2022-03-01 18:23:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13251 states have (on average 3.5927099841521395) internal successors, (47607), 13251 states have internal predecessors, (47607), 0 states have call successors, (0), 0 states 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 18:23:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 47607 transitions. [2022-03-01 18:23:28,968 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 47607 transitions. Word has length 28 [2022-03-01 18:23:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:28,968 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 47607 transitions. [2022-03-01 18:23:28,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 18:23:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 47607 transitions. [2022-03-01 18:23:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:28,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:28,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:29,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:29,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:29,223 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash 495899154, now seen corresponding path program 132 times [2022-03-01 18:23:29,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:29,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476379321] [2022-03-01 18:23:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:29,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:29,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476379321] [2022-03-01 18:23:29,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476379321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:29,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342464103] [2022-03-01 18:23:29,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:29,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:29,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:29,445 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:29,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 18:23:29,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:23:29,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:23:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:29,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:29,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:29,872 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 42 treesize of output 46 [2022-03-01 18:23:29,875 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 69 treesize of output 59 [2022-03-01 18:23:30,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:30,008 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 59 treesize of output 59 [2022-03-01 18:23:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:30,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:30,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:30,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 79 [2022-03-01 18:23:31,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:31,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 90 [2022-03-01 18:23:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:31,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342464103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:31,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:31,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-03-01 18:23:31,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904172898] [2022-03-01 18:23:31,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:31,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:23:31,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:23:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:23:31,477 INFO L87 Difference]: Start difference. First operand 13252 states and 47607 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 18:23:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:34,062 INFO L93 Difference]: Finished difference Result 22494 states and 78741 transitions. [2022-03-01 18:23:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:23:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-03-01 18:23:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:34,124 INFO L225 Difference]: With dead ends: 22494 [2022-03-01 18:23:34,124 INFO L226 Difference]: Without dead ends: 22457 [2022-03-01 18:23:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:23:34,125 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 248 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:34,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 318 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 742 Invalid, 0 Unknown, 1298 Unchecked, 0.3s Time] [2022-03-01 18:23:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22457 states. [2022-03-01 18:23:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22457 to 13326. [2022-03-01 18:23:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13325 states have (on average 3.588893058161351) internal successors, (47822), 13325 states have internal predecessors, (47822), 0 states have call successors, (0), 0 states 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 18:23:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 47822 transitions. [2022-03-01 18:23:34,462 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 47822 transitions. Word has length 28 [2022-03-01 18:23:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:34,463 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 47822 transitions. [2022-03-01 18:23:34,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 18:23:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 47822 transitions. [2022-03-01 18:23:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:34,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:34,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:34,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:34,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:34,701 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1588869650, now seen corresponding path program 133 times [2022-03-01 18:23:34,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:34,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458679507] [2022-03-01 18:23:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:34,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:34,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458679507] [2022-03-01 18:23:34,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458679507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:34,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664932855] [2022-03-01 18:23:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:34,871 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 18:23:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:35,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:35,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,227 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 49 treesize of output 37 [2022-03-01 18:23:35,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:35,391 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:35,392 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 30 treesize of output 55 [2022-03-01 18:23:35,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:35,447 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 31 treesize of output 15 [2022-03-01 18:23:35,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,511 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:35,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:35,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:35,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664932855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:35,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:35,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:35,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766732898] [2022-03-01 18:23:35,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:35,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:35,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:35,613 INFO L87 Difference]: Start difference. First operand 13326 states and 47822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:36,094 INFO L93 Difference]: Finished difference Result 16438 states and 58225 transitions. [2022-03-01 18:23:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:23:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:36,136 INFO L225 Difference]: With dead ends: 16438 [2022-03-01 18:23:36,137 INFO L226 Difference]: Without dead ends: 16423 [2022-03-01 18:23:36,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:23:36,137 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:36,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 220 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 712 Invalid, 0 Unknown, 298 Unchecked, 0.3s Time] [2022-03-01 18:23:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16423 states. [2022-03-01 18:23:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16423 to 13316. [2022-03-01 18:23:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 13315 states have (on average 3.590837401426962) internal successors, (47812), 13315 states have internal predecessors, (47812), 0 states have call successors, (0), 0 states 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 18:23:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 47812 transitions. [2022-03-01 18:23:36,392 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 47812 transitions. Word has length 28 [2022-03-01 18:23:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:36,392 INFO L470 AbstractCegarLoop]: Abstraction has 13316 states and 47812 transitions. [2022-03-01 18:23:36,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 47812 transitions. [2022-03-01 18:23:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:36,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:36,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:36,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:36,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:36,631 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1983508238, now seen corresponding path program 134 times [2022-03-01 18:23:36,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:36,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316026334] [2022-03-01 18:23:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:36,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:36,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:36,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316026334] [2022-03-01 18:23:36,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316026334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:36,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105195180] [2022-03-01 18:23:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:36,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:36,892 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:36,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 18:23:36,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:37,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:37,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-01 18:23:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,381 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 37 treesize of output 25 [2022-03-01 18:23:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:37,528 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:37,528 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 30 treesize of output 55 [2022-03-01 18:23:37,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:37,589 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 30 treesize of output 14 [2022-03-01 18:23:37,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,683 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:37,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:37,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:37,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105195180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:37,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:37,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-01 18:23:37,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693920054] [2022-03-01 18:23:37,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:37,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:23:37,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:23:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:23:37,801 INFO L87 Difference]: Start difference. First operand 13316 states and 47812 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:23:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:38,244 INFO L93 Difference]: Finished difference Result 16291 states and 57840 transitions. [2022-03-01 18:23:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:23:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 28 [2022-03-01 18:23:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:38,287 INFO L225 Difference]: With dead ends: 16291 [2022-03-01 18:23:38,287 INFO L226 Difference]: Without dead ends: 16276 [2022-03-01 18:23:38,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:23:38,287 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:38,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 268 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 564 Invalid, 0 Unknown, 501 Unchecked, 0.2s Time] [2022-03-01 18:23:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2022-03-01 18:23:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 13344. [2022-03-01 18:23:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 13343 states have (on average 3.5899722701041745) internal successors, (47901), 13343 states have internal predecessors, (47901), 0 states have call successors, (0), 0 states 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 18:23:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 47901 transitions. [2022-03-01 18:23:38,561 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 47901 transitions. Word has length 28 [2022-03-01 18:23:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:38,561 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 47901 transitions. [2022-03-01 18:23:38,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 18:23:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 47901 transitions. [2022-03-01 18:23:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:38,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:38,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:38,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 18:23:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:38,787 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1243584494, now seen corresponding path program 135 times [2022-03-01 18:23:38,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:38,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333963789] [2022-03-01 18:23:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:38,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:39,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:39,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333963789] [2022-03-01 18:23:39,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333963789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:39,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881263773] [2022-03-01 18:23:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:39,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:39,005 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:39,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 18:23:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:23:39,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:39,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:39,421 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 24 treesize of output 20 [2022-03-01 18:23:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:39,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-01 18:23:39,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:39,584 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:39,588 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 30 treesize of output 55 [2022-03-01 18:23:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:39,648 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 31 treesize of output 15 [2022-03-01 18:23:39,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,730 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:39,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:39,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:39,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881263773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:39,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:39,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:39,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701225469] [2022-03-01 18:23:39,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:39,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:39,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:39,831 INFO L87 Difference]: Start difference. First operand 13344 states and 47901 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:40,338 INFO L93 Difference]: Finished difference Result 16489 states and 58443 transitions. [2022-03-01 18:23:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:23:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:40,382 INFO L225 Difference]: With dead ends: 16489 [2022-03-01 18:23:40,382 INFO L226 Difference]: Without dead ends: 16467 [2022-03-01 18:23:40,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:23:40,382 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:40,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 214 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 589 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-03-01 18:23:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2022-03-01 18:23:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 13355. [2022-03-01 18:23:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13355 states, 13354 states have (on average 3.5897109480305525) internal successors, (47937), 13354 states have internal predecessors, (47937), 0 states have call successors, (0), 0 states 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 18:23:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13355 states to 13355 states and 47937 transitions. [2022-03-01 18:23:40,674 INFO L78 Accepts]: Start accepts. Automaton has 13355 states and 47937 transitions. Word has length 28 [2022-03-01 18:23:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:40,674 INFO L470 AbstractCegarLoop]: Abstraction has 13355 states and 47937 transitions. [2022-03-01 18:23:40,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 13355 states and 47937 transitions. [2022-03-01 18:23:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:40,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:40,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:40,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 18:23:40,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 18:23:40,915 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1394116370, now seen corresponding path program 136 times [2022-03-01 18:23:40,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:40,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530933656] [2022-03-01 18:23:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:40,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:41,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:41,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530933656] [2022-03-01 18:23:41,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530933656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:41,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989735809] [2022-03-01 18:23:41,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:41,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:41,139 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:41,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 18:23:41,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:41,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:41,495 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 31 treesize of output 27 [2022-03-01 18:23:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,498 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 43 treesize of output 31 [2022-03-01 18:23:41,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-03-01 18:23:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:41,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:41,682 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:41,682 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 30 treesize of output 55 [2022-03-01 18:23:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:41,760 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 31 treesize of output 15 [2022-03-01 18:23:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,855 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:41,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:41,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:41,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989735809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:41,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:41,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:41,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323309129] [2022-03-01 18:23:41,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:41,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:41,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:41,989 INFO L87 Difference]: Start difference. First operand 13355 states and 47937 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:42,580 INFO L93 Difference]: Finished difference Result 16399 states and 58176 transitions. [2022-03-01 18:23:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:23:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:42,623 INFO L225 Difference]: With dead ends: 16399 [2022-03-01 18:23:42,623 INFO L226 Difference]: Without dead ends: 16384 [2022-03-01 18:23:42,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:23:42,623 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:42,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 218 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 871 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-03-01 18:23:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16384 states. [2022-03-01 18:23:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16384 to 13379. [2022-03-01 18:23:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13379 states, 13378 states have (on average 3.5891015099416954) internal successors, (48015), 13378 states have internal predecessors, (48015), 0 states have call successors, (0), 0 states 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 18:23:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13379 states to 13379 states and 48015 transitions. [2022-03-01 18:23:42,897 INFO L78 Accepts]: Start accepts. Automaton has 13379 states and 48015 transitions. Word has length 28 [2022-03-01 18:23:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:42,897 INFO L470 AbstractCegarLoop]: Abstraction has 13379 states and 48015 transitions. [2022-03-01 18:23:42,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 13379 states and 48015 transitions. [2022-03-01 18:23:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:42,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:42,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:42,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:43,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-01 18:23:43,139 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1422186770, now seen corresponding path program 137 times [2022-03-01 18:23:43,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:43,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400882139] [2022-03-01 18:23:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:43,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:43,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400882139] [2022-03-01 18:23:43,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400882139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:43,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943258069] [2022-03-01 18:23:43,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:43,343 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:43,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 18:23:43,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:23:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:43,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,765 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 46 treesize of output 34 [2022-03-01 18:23:43,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:43,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:43,958 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:43,958 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 30 treesize of output 55 [2022-03-01 18:23:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:44,023 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 31 treesize of output 15 [2022-03-01 18:23:44,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:44,107 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:44,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:44,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:44,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:44,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:44,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:44,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943258069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:44,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:44,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:44,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265667701] [2022-03-01 18:23:44,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:44,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:44,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:44,244 INFO L87 Difference]: Start difference. First operand 13379 states and 48015 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:44,788 INFO L93 Difference]: Finished difference Result 16427 states and 58227 transitions. [2022-03-01 18:23:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:23:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:44,833 INFO L225 Difference]: With dead ends: 16427 [2022-03-01 18:23:44,833 INFO L226 Difference]: Without dead ends: 16405 [2022-03-01 18:23:44,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:23:44,833 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:44,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 753 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-03-01 18:23:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2022-03-01 18:23:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 13384. [2022-03-01 18:23:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 0 states have call successors, (0), 0 states 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 18:23:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-03-01 18:23:45,113 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-03-01 18:23:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:45,113 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-03-01 18:23:45,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-03-01 18:23:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:45,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:45,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:45,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 18:23:45,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 18:23:45,353 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 64634450, now seen corresponding path program 138 times [2022-03-01 18:23:45,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:45,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530348307] [2022-03-01 18:23:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:45,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:45,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530348307] [2022-03-01 18:23:45,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530348307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:45,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093939186] [2022-03-01 18:23:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:45,581 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:45,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 18:23:45,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:23:45,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:45,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:46,031 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 24 treesize of output 20 [2022-03-01 18:23:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:46,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,034 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 34 treesize of output 22 [2022-03-01 18:23:46,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:23:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:46,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:46,210 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:46,210 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 30 treesize of output 55 [2022-03-01 18:23:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:46,256 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 31 treesize of output 15 [2022-03-01 18:23:46,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,328 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:46,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-03-01 18:23:46,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:46,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:46,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:46,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093939186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:46,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:46,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:46,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010727660] [2022-03-01 18:23:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:46,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:46,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:46,426 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:46,920 INFO L93 Difference]: Finished difference Result 16415 states and 58199 transitions. [2022-03-01 18:23:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:23:46,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:46,964 INFO L225 Difference]: With dead ends: 16415 [2022-03-01 18:23:46,964 INFO L226 Difference]: Without dead ends: 16393 [2022-03-01 18:23:46,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:23:46,965 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:46,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 199 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 722 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-03-01 18:23:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2022-03-01 18:23:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 13384. [2022-03-01 18:23:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 0 states have call successors, (0), 0 states 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 18:23:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-03-01 18:23:47,261 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-03-01 18:23:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:47,261 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-03-01 18:23:47,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-03-01 18:23:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:47,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:47,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:47,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-01 18:23:47,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 18:23:47,503 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1351336178, now seen corresponding path program 139 times [2022-03-01 18:23:47,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:47,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376695735] [2022-03-01 18:23:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:47,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:47,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376695735] [2022-03-01 18:23:47,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376695735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:47,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335838028] [2022-03-01 18:23:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:47,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:47,709 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:47,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 18:23:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:47,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:48,081 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 24 treesize of output 20 [2022-03-01 18:23:48,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-01 18:23:48,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:23:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:48,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:48,252 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:48,252 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 58 [2022-03-01 18:23:48,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:48,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:48,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:48,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-01 18:23:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:48,352 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:48,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:48,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:48,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:48,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335838028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:48,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:48,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:48,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55689634] [2022-03-01 18:23:48,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:48,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:48,439 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:23:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:49,432 INFO L93 Difference]: Finished difference Result 16590 states and 58631 transitions. [2022-03-01 18:23:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:23:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 28 [2022-03-01 18:23:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:49,474 INFO L225 Difference]: With dead ends: 16590 [2022-03-01 18:23:49,474 INFO L226 Difference]: Without dead ends: 16534 [2022-03-01 18:23:49,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:23:49,475 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:49,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 510 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:23:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2022-03-01 18:23:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 13423. [2022-03-01 18:23:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13423 states, 13422 states have (on average 3.5890329310087914) internal successors, (48172), 13422 states have internal predecessors, (48172), 0 states have call successors, (0), 0 states 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 18:23:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 48172 transitions. [2022-03-01 18:23:49,752 INFO L78 Accepts]: Start accepts. Automaton has 13423 states and 48172 transitions. Word has length 28 [2022-03-01 18:23:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:49,752 INFO L470 AbstractCegarLoop]: Abstraction has 13423 states and 48172 transitions. [2022-03-01 18:23:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 18:23:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 13423 states and 48172 transitions. [2022-03-01 18:23:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:49,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:49,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:49,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-01 18:23:50,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:50,044 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash -677061838, now seen corresponding path program 140 times [2022-03-01 18:23:50,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:50,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390636564] [2022-03-01 18:23:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:50,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:50,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390636564] [2022-03-01 18:23:50,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390636564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:50,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327818864] [2022-03-01 18:23:50,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:50,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:50,233 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:50,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 18:23:50,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:23:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:50,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 18:23:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,585 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 40 treesize of output 30 [2022-03-01 18:23:50,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:23:50,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:23:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:50,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:50,794 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:23:50,794 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 58 [2022-03-01 18:23:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:50,865 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 17 [2022-03-01 18:23:50,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,924 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:23:50,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-01 18:23:50,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:50,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:23:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:51,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327818864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:51,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:51,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 18:23:51,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626515396] [2022-03-01 18:23:51,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:51,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:23:51,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:23:51,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:23:51,045 INFO L87 Difference]: Start difference. First operand 13423 states and 48172 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:51,560 INFO L93 Difference]: Finished difference Result 13748 states and 49036 transitions. [2022-03-01 18:23:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:23:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:23:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:51,593 INFO L225 Difference]: With dead ends: 13748 [2022-03-01 18:23:51,594 INFO L226 Difference]: Without dead ends: 13733 [2022-03-01 18:23:51,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:23:51,594 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:51,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 338 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 932 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2022-03-01 18:23:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13733 states. [2022-03-01 18:23:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13733 to 13449. [2022-03-01 18:23:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13449 states, 13448 states have (on average 3.5883402736466388) internal successors, (48256), 13448 states have internal predecessors, (48256), 0 states have call successors, (0), 0 states 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 18:23:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 48256 transitions. [2022-03-01 18:23:51,841 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 48256 transitions. Word has length 28 [2022-03-01 18:23:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:51,841 INFO L470 AbstractCegarLoop]: Abstraction has 13449 states and 48256 transitions. [2022-03-01 18:23:51,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 48256 transitions. [2022-03-01 18:23:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:23:51,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:51,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:51,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-01 18:23:52,083 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1456034806, now seen corresponding path program 141 times [2022-03-01 18:23:52,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:52,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5341557] [2022-03-01 18:23:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:52,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:52,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:52,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5341557] [2022-03-01 18:23:52,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5341557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:52,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081344548] [2022-03-01 18:23:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:52,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:52,288 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 18:23:52,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:23:52,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:52,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:23:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:52,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-01 18:23:52,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-01 18:23:52,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-01 18:23:52,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:52,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-03-01 18:32:03,183 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-01 18:32:03,186 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:32:03,201 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:32:03,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:03,208 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:32:03,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:03,402 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. [2022-03-01 18:32:03,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:32:03,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:32:03,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:32:03,406 INFO L732 BasicCegarLoop]: Path program histogram: [141, 5, 2, 1, 1, 1] [2022-03-01 18:32:03,407 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:32:03,407 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:32:03,408 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:32:03 BasicIcfg [2022-03-01 18:32:03,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:32:03,409 INFO L158 Benchmark]: Toolchain (without parser) took 870047.51ms. Allocated memory was 229.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 195.0MB in the beginning and 600.7MB in the end (delta: -405.7MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-01 18:32:03,409 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 229.6MB. Free memory was 196.3MB in the beginning and 196.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:32:03,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.40ms. Allocated memory is still 229.6MB. Free memory was 195.0MB in the beginning and 193.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-01 18:32:03,409 INFO L158 Benchmark]: Boogie Preprocessor took 19.31ms. Allocated memory is still 229.6MB. Free memory was 193.5MB in the beginning and 192.6MB in the end (delta: 899.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:32:03,409 INFO L158 Benchmark]: RCFGBuilder took 168.77ms. Allocated memory is still 229.6MB. Free memory was 192.4MB in the beginning and 182.9MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:32:03,409 INFO L158 Benchmark]: TraceAbstraction took 869828.52ms. Allocated memory was 229.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 182.5MB in the beginning and 600.7MB in the end (delta: -418.2MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-01 18:32:03,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 229.6MB. Free memory was 196.3MB in the beginning and 196.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.40ms. Allocated memory is still 229.6MB. Free memory was 195.0MB in the beginning and 193.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.31ms. Allocated memory is still 229.6MB. Free memory was 193.5MB in the beginning and 192.6MB in the end (delta: 899.5kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 168.77ms. Allocated memory is still 229.6MB. Free memory was 192.4MB in the beginning and 182.9MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 869828.52ms. Allocated memory was 229.6MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 182.5MB in the beginning and 600.7MB in the end (delta: -418.2MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 40 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 869.8s, OverallIterations: 151, TraceHistogramMax: 2, PathProgramHistogramMax: 141, EmptinessCheckTime: 2.8s, AutomataDifference: 159.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21005 SdHoareTripleChecker+Valid, 48.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21005 mSDsluCounter, 40114 SdHoareTripleChecker+Invalid, 41.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60372 IncrementalHoareTripleChecker+Unchecked, 67982 mSDsCounter, 4307 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108260 IncrementalHoareTripleChecker+Invalid, 172939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4307 mSolverCounterUnsat, 4476 mSDtfsCounter, 108260 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11466 GetRequests, 5793 SyntacticMatches, 623 SemanticMatches, 5050 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 80441 ImplicationChecksByTransitivity, 131.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13449occurred in iteration=150, InterpolantAutomatonStates: 4399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 31.7s AutomataMinimizationTime, 150 MinimizatonAttempts, 531030 StatesRemovedByMinimization, 150 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 144.8s InterpolantComputationTime, 7858 NumberOfCodeBlocks, 7858 NumberOfCodeBlocksAsserted, 480 NumberOfCheckSat, 11282 ConstructedInterpolants, 1162 QuantifiedInterpolants, 285645 SizeOfPredicates, 1175 NumberOfNonLiveVariables, 11431 ConjunctsInSsa, 4722 ConjunctsInUnsatCore, 434 InterpolantComputations, 8 PerfectInterpolantSequences, 205/4606 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown