/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:19:46,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:19:46,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:19:46,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:19:46,535 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 [2022-03-15 16:19:46,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:19:46,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:19:46,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:19:46,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:19:46,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:19:46,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:19:46,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:19:46,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:19:46,555 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:19:46,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:19:46,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:19:46,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:19:46,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:19:46,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:19:46,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:19:46,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:19:46,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:19:46,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:19:46,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:19:46,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:19:46,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:19:46,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:19:46,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2022-03-15 16:19:46,761 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2022-03-15 16:19:46,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:19:46,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:19:46,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:19:46,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:19:46,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:19:46,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,802 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:19:46,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:19:46,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:19:46,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:19:46,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:19:46,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:19:46,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:19:46,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:19:46,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:19:46,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/1) ... [2022-03-15 16:19:46,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:19:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:46,865 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) [2022-03-15 16:19:46,889 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 [2022-03-15 16:19:46,903 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:19:46,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:19:46,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:19:46,903 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:19:46,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:19:46,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:19:46,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:19:46,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:19:46,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:19:46,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:19:46,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:19:46,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:19:46,905 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 16:19:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 16:19:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 16:19:46,906 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:19:46,944 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:19:46,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:19:47,033 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:19:47,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:19:47,047 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:19:47,048 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:19:47 BoogieIcfgContainer [2022-03-15 16:19:47,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:19:47,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:19:47,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:19:47,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:19:47,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:46" (1/2) ... [2022-03-15 16:19:47,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c53e4f4 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:19:47, skipping insertion in model container [2022-03-15 16:19:47,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:19:47" (2/2) ... [2022-03-15 16:19:47,065 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2022-03-15 16:19:47,068 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:19:47,068 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:19:47,069 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:19:47,069 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:19:47,128 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 16:19:47,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:19:47,172 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 [2022-03-15 16:19:47,172 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-15 16:19:47,178 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2022-03-15 16:19:47,254 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:47,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:47,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:47,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 179406345, now seen corresponding path program 1 times [2022-03-15 16:19:47,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:47,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818522452] [2022-03-15 16:19:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:47,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:47,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:47,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818522452] [2022-03-15 16:19:47,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818522452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:47,382 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:47,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:19:47,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002961689] [2022-03-15 16:19:47,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:47,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:19:47,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:19:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,409 INFO L87 Difference]: Start difference. First operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:47,475 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2022-03-15 16:19:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:19:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:47,497 INFO L225 Difference]: With dead ends: 912 [2022-03-15 16:19:47,497 INFO L226 Difference]: Without dead ends: 539 [2022-03-15 16:19:47,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:47,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-03-15 16:19:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2022-03-15 16:19:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2022-03-15 16:19:47,603 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2022-03-15 16:19:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:47,607 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2022-03-15 16:19:47,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2022-03-15 16:19:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:47,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:47,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:19:47,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -483784061, now seen corresponding path program 2 times [2022-03-15 16:19:47,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:47,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449197972] [2022-03-15 16:19:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:47,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:47,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449197972] [2022-03-15 16:19:47,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449197972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:47,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:47,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:19:47,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311978825] [2022-03-15 16:19:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:47,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:19:47,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:19:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:47,660 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:47,739 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2022-03-15 16:19:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:19:47,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:47,743 INFO L225 Difference]: With dead ends: 863 [2022-03-15 16:19:47,743 INFO L226 Difference]: Without dead ends: 671 [2022-03-15 16:19:47,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:19:47,745 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:47,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-03-15 16:19:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2022-03-15 16:19:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2022-03-15 16:19:47,774 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2022-03-15 16:19:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:47,775 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2022-03-15 16:19:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2022-03-15 16:19:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:19:47,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:47,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:47,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:19:47,778 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 683624999, now seen corresponding path program 1 times [2022-03-15 16:19:47,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:47,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149727623] [2022-03-15 16:19:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:47,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149727623] [2022-03-15 16:19:47,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149727623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:47,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:47,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:19:47,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094560653] [2022-03-15 16:19:47,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:47,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:19:47,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:19:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,840 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:47,870 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2022-03-15 16:19:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:19:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:19:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:47,874 INFO L225 Difference]: With dead ends: 752 [2022-03-15 16:19:47,874 INFO L226 Difference]: Without dead ends: 752 [2022-03-15 16:19:47,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,880 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:47,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-15 16:19:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-03-15 16:19:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2022-03-15 16:19:47,906 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2022-03-15 16:19:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:47,906 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2022-03-15 16:19:47,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2022-03-15 16:19:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:47,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:47,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:47,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:19:47,910 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -699174524, now seen corresponding path program 1 times [2022-03-15 16:19:47,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:47,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394043525] [2022-03-15 16:19:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:19:47,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:47,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394043525] [2022-03-15 16:19:47,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394043525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:47,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:47,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:19:47,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808674912] [2022-03-15 16:19:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:47,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:19:47,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:19:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,953 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2022-03-15 16:19:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:47,982 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2022-03-15 16:19:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:19:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:19:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:47,987 INFO L225 Difference]: With dead ends: 800 [2022-03-15 16:19:47,987 INFO L226 Difference]: Without dead ends: 774 [2022-03-15 16:19:47,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:47,995 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:47,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-03-15 16:19:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2022-03-15 16:19:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2022-03-15 16:19:48,016 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2022-03-15 16:19:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:48,016 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2022-03-15 16:19:48,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2022-03-15 16:19:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2022-03-15 16:19:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:19:48,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:48,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:48,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:19:48,020 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 555677261, now seen corresponding path program 1 times [2022-03-15 16:19:48,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:48,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414974385] [2022-03-15 16:19:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:48,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:48,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414974385] [2022-03-15 16:19:48,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414974385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771592291] [2022-03-15 16:19:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:48,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:48,255 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) [2022-03-15 16:19:48,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:19:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:19:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:48,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:19:48,689 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 11 treesize of output 7 [2022-03-15 16:19:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:48,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:48,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:48,827 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 22 [2022-03-15 16:19:48,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:48,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-15 16:19:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:49,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771592291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:49,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:49,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:19:49,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907943794] [2022-03-15 16:19:49,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:19:49,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:19:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:19:49,120 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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) [2022-03-15 16:19:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:50,144 INFO L93 Difference]: Finished difference Result 2142 states and 6646 transitions. [2022-03-15 16:19:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:19:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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 34 [2022-03-15 16:19:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:50,152 INFO L225 Difference]: With dead ends: 2142 [2022-03-15 16:19:50,152 INFO L226 Difference]: Without dead ends: 1716 [2022-03-15 16:19:50,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=586, Invalid=2384, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:19:50,154 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 517 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:50,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 330 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:19:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-03-15 16:19:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 906. [2022-03-15 16:19:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2022-03-15 16:19:50,178 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2022-03-15 16:19:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2022-03-15 16:19:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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) [2022-03-15 16:19:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2022-03-15 16:19:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:19:50,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:50,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:50,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:50,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:50,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 561664541, now seen corresponding path program 2 times [2022-03-15 16:19:50,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:50,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218813238] [2022-03-15 16:19:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:50,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218813238] [2022-03-15 16:19:50,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218813238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147342541] [2022-03-15 16:19:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:50,432 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) [2022-03-15 16:19:50,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:19:50,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:19:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:19:50,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 16:19:50,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147342541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:50,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 16:19:50,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-03-15 16:19:50,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821363900] [2022-03-15 16:19:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:50,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:19:50,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:19:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:50,520 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:50,550 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2022-03-15 16:19:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:19:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:19:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:50,561 INFO L225 Difference]: With dead ends: 2380 [2022-03-15 16:19:50,561 INFO L226 Difference]: Without dead ends: 2330 [2022-03-15 16:19:50,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:50,562 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:50,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-03-15 16:19:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2022-03-15 16:19:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2022-03-15 16:19:50,604 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2022-03-15 16:19:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:50,605 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2022-03-15 16:19:50,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2022-03-15 16:19:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 16:19:50,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:50,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:50,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:50,827 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,SelfDestructingSolverStorable5 [2022-03-15 16:19:50,828 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1536215610, now seen corresponding path program 3 times [2022-03-15 16:19:50,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:50,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595780543] [2022-03-15 16:19:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:19:50,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:50,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595780543] [2022-03-15 16:19:50,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595780543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:50,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399401967] [2022-03-15 16:19:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:50,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:50,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:50,865 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) [2022-03-15 16:19:50,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:19:50,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:19:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:19:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:19:50,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 16:19:50,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399401967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:50,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 16:19:50,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-03-15 16:19:50,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066267941] [2022-03-15 16:19:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:50,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:19:50,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:19:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:50,952 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2022-03-15 16:19:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:51,012 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2022-03-15 16:19:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:19:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 41 [2022-03-15 16:19:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:51,033 INFO L225 Difference]: With dead ends: 4845 [2022-03-15 16:19:51,033 INFO L226 Difference]: Without dead ends: 4554 [2022-03-15 16:19:51,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:51,034 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:51,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-03-15 16:19:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2022-03-15 16:19:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2022-03-15 16:19:51,125 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2022-03-15 16:19:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:51,125 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2022-03-15 16:19:51,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2022-03-15 16:19:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2022-03-15 16:19:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:19:51,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:51,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:51,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:51,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:51,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:19:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash 621598743, now seen corresponding path program 4 times [2022-03-15 16:19:51,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:51,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537187319] [2022-03-15 16:19:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:19:51,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:51,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537187319] [2022-03-15 16:19:51,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537187319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:51,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870323840] [2022-03-15 16:19:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:51,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:51,726 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) [2022-03-15 16:19:51,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:19:51,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:19:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:52,330 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:19:52,330 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 31 treesize of output 19 [2022-03-15 16:19:52,412 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:19:52,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:19:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:52,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:52,775 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:19:52,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:19:53,014 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:19:53,014 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 58 [2022-03-15 16:19:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:53,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870323840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:53,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:53,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2022-03-15 16:19:53,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500335101] [2022-03-15 16:19:53,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:53,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:19:53,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:19:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:19:53,313 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:39,676 INFO L93 Difference]: Finished difference Result 51739 states and 168758 transitions. [2022-03-15 16:20:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-03-15 16:20:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:20:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:39,863 INFO L225 Difference]: With dead ends: 51739 [2022-03-15 16:20:39,863 INFO L226 Difference]: Without dead ends: 44084 [2022-03-15 16:20:39,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237275 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=55167, Invalid=434133, Unknown=0, NotChecked=0, Total=489300 [2022-03-15 16:20:39,903 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 4921 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 7578 mSolverCounterSat, 1771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4921 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 9349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1771 IncrementalHoareTripleChecker+Valid, 7578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:39,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4921 Valid, 2500 Invalid, 9349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1771 Valid, 7578 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-15 16:20:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44084 states. [2022-03-15 16:20:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44084 to 6431. [2022-03-15 16:20:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.4334370139968895) internal successors, (22077), 6430 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 22077 transitions. [2022-03-15 16:20:40,470 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 22077 transitions. Word has length 44 [2022-03-15 16:20:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:40,471 INFO L470 AbstractCegarLoop]: Abstraction has 6431 states and 22077 transitions. [2022-03-15 16:20:40,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 22077 transitions. [2022-03-15 16:20:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:20:40,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:40,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:40,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 16:20:40,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:40,701 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:20:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash -857814709, now seen corresponding path program 5 times [2022-03-15 16:20:40,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:40,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711815464] [2022-03-15 16:20:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:40,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:41,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:41,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711815464] [2022-03-15 16:20:41,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711815464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:41,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247078265] [2022-03-15 16:20:41,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:41,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:41,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:41,029 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) [2022-03-15 16:20:41,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:20:41,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:20:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:20:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:41,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:41,547 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 29 treesize of output 17 [2022-03-15 16:20:41,717 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:20:41,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:20:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:41,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:20:41,980 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 58 [2022-03-15 16:20:42,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:42,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:20:42,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-03-15 16:20:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:42,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247078265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:42,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:42,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-15 16:20:42,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266028893] [2022-03-15 16:20:42,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:42,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:20:42,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:20:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:20:42,686 INFO L87 Difference]: Start difference. First operand 6431 states and 22077 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:06,904 INFO L93 Difference]: Finished difference Result 57685 states and 186519 transitions. [2022-03-15 16:21:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2022-03-15 16:21:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:21:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:07,221 INFO L225 Difference]: With dead ends: 57685 [2022-03-15 16:21:07,221 INFO L226 Difference]: Without dead ends: 56637 [2022-03-15 16:21:07,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93059 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=27309, Invalid=175641, Unknown=0, NotChecked=0, Total=202950 [2022-03-15 16:21:07,229 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 2145 mSDsluCounter, 3967 mSDsCounter, 0 mSdLazyCounter, 8137 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 9032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 8137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:07,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 1803 Invalid, 9032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 8137 Invalid, 0 Unknown, 189 Unchecked, 3.8s Time] [2022-03-15 16:21:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56637 states. [2022-03-15 16:21:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56637 to 7979. [2022-03-15 16:21:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7978 states have (on average 3.422787666081725) internal successors, (27307), 7978 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27307 transitions. [2022-03-15 16:21:07,867 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27307 transitions. Word has length 44 [2022-03-15 16:21:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:07,867 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27307 transitions. [2022-03-15 16:21:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27307 transitions. [2022-03-15 16:21:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:21:07,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:07,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:07,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:08,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:21:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1365138515, now seen corresponding path program 6 times [2022-03-15 16:21:08,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:08,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732397403] [2022-03-15 16:21:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:08,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:08,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732397403] [2022-03-15 16:21:08,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732397403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:08,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52500529] [2022-03-15 16:21:08,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:08,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:08,424 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) [2022-03-15 16:21:08,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:21:08,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:21:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:21:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:08,841 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:21:08,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:21:09,002 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:21:09,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:21:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:09,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:09,286 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:09,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:21:09,560 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:09,561 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 58 [2022-03-15 16:21:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:09,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52500529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:09,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:09,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:21:09,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042962211] [2022-03-15 16:21:09,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:09,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:21:09,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:21:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:21:09,903 INFO L87 Difference]: Start difference. First operand 7979 states and 27307 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:40,044 INFO L93 Difference]: Finished difference Result 70182 states and 229734 transitions. [2022-03-15 16:21:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 483 states. [2022-03-15 16:21:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:21:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:40,535 INFO L225 Difference]: With dead ends: 70182 [2022-03-15 16:21:40,535 INFO L226 Difference]: Without dead ends: 68860 [2022-03-15 16:21:40,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126510 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=32128, Invalid=245074, Unknown=0, NotChecked=0, Total=277202 [2022-03-15 16:21:40,545 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2422 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 7200 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 8068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 7200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:40,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 1424 Invalid, 8068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 7200 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-15 16:21:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68860 states. [2022-03-15 16:21:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68860 to 8486. [2022-03-15 16:21:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8486 states, 8485 states have (on average 3.4238067177371834) internal successors, (29051), 8485 states have internal predecessors, (29051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 29051 transitions. [2022-03-15 16:21:41,237 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 29051 transitions. Word has length 44 [2022-03-15 16:21:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:41,237 INFO L470 AbstractCegarLoop]: Abstraction has 8486 states and 29051 transitions. [2022-03-15 16:21:41,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 29051 transitions. [2022-03-15 16:21:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:21:41,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:41,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:41,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:41,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:41,459 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:21:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2011749771, now seen corresponding path program 7 times [2022-03-15 16:21:41,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:41,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048901763] [2022-03-15 16:21:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:41,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:41,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:41,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048901763] [2022-03-15 16:21:41,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048901763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:41,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579178728] [2022-03-15 16:21:41,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:41,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:41,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:41,801 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) [2022-03-15 16:21:41,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:21:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:21:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:42,251 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:21:42,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:21:42,388 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:21:42,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:21:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:42,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:42,687 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:42,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:21:42,977 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:42,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:21:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579178728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:43,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:43,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:21:43,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223325074] [2022-03-15 16:21:43,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:21:43,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:21:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:21:43,284 INFO L87 Difference]: Start difference. First operand 8486 states and 29051 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:19,173 INFO L93 Difference]: Finished difference Result 99443 states and 325378 transitions. [2022-03-15 16:22:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 541 states. [2022-03-15 16:22:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:22:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:19,718 INFO L225 Difference]: With dead ends: 99443 [2022-03-15 16:22:19,718 INFO L226 Difference]: Without dead ends: 96214 [2022-03-15 16:22:19,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159241 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=39564, Invalid=303246, Unknown=0, NotChecked=0, Total=342810 [2022-03-15 16:22:19,730 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3202 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 7149 mSolverCounterSat, 1178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3202 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 8327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1178 IncrementalHoareTripleChecker+Valid, 7149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:19,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3202 Valid, 1454 Invalid, 8327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1178 Valid, 7149 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-15 16:22:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96214 states. [2022-03-15 16:22:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96214 to 10781. [2022-03-15 16:22:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10781 states, 10780 states have (on average 3.4189239332096477) internal successors, (36856), 10780 states have internal predecessors, (36856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 36856 transitions. [2022-03-15 16:22:20,707 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 36856 transitions. Word has length 44 [2022-03-15 16:22:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 10781 states and 36856 transitions. [2022-03-15 16:22:20,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 36856 transitions. [2022-03-15 16:22:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:22:20,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:20,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:20,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:20,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:20,932 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:22:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1976679839, now seen corresponding path program 8 times [2022-03-15 16:22:20,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:20,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155560724] [2022-03-15 16:22:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:21,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:21,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155560724] [2022-03-15 16:22:21,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155560724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:21,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336535720] [2022-03-15 16:22:21,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:22:21,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:21,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:21,257 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) [2022-03-15 16:22:21,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:22:21,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:22:21,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:22:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:21,714 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:22:21,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:22:21,833 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:22:21,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:22:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:21,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:22,149 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:22:22,150 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 58 [2022-03-15 16:22:22,445 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:22:22,446 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 58 [2022-03-15 16:22:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:22,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336535720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:22,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:22,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:22:22,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856907476] [2022-03-15 16:22:22,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:22,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:22:22,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:22:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:22:22,705 INFO L87 Difference]: Start difference. First operand 10781 states and 36856 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:44,005 INFO L93 Difference]: Finished difference Result 72714 states and 237510 transitions. [2022-03-15 16:22:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2022-03-15 16:22:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:22:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:44,225 INFO L225 Difference]: With dead ends: 72714 [2022-03-15 16:22:44,226 INFO L226 Difference]: Without dead ends: 71522 [2022-03-15 16:22:44,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72497 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=19555, Invalid=144875, Unknown=0, NotChecked=0, Total=164430 [2022-03-15 16:22:44,233 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2532 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 5890 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 6833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 5890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:44,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2532 Valid, 1214 Invalid, 6833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 5890 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 16:22:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71522 states. [2022-03-15 16:22:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71522 to 10918. [2022-03-15 16:22:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10918 states, 10917 states have (on average 3.418887972886324) internal successors, (37324), 10917 states have internal predecessors, (37324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10918 states to 10918 states and 37324 transitions. [2022-03-15 16:22:45,042 INFO L78 Accepts]: Start accepts. Automaton has 10918 states and 37324 transitions. Word has length 44 [2022-03-15 16:22:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:45,052 INFO L470 AbstractCegarLoop]: Abstraction has 10918 states and 37324 transitions. [2022-03-15 16:22:45,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10918 states and 37324 transitions. [2022-03-15 16:22:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:22:45,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:45,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:45,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:45,281 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,SelfDestructingSolverStorable11 [2022-03-15 16:22:45,281 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:22:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1400208447, now seen corresponding path program 9 times [2022-03-15 16:22:45,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:45,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338789486] [2022-03-15 16:22:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:45,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:45,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338789486] [2022-03-15 16:22:45,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338789486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:45,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252003590] [2022-03-15 16:22:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:45,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:45,578 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) [2022-03-15 16:22:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:22:45,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:22:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:22:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:46,049 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:22:46,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:22:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:46,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:46,210 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 25 treesize of output 13 [2022-03-15 16:22:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:46,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:46,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:22:46,534 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 32 treesize of output 58 [2022-03-15 16:22:46,888 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:22:46,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2022-03-15 16:22:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:47,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252003590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:47,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:47,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:22:47,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750349512] [2022-03-15 16:22:47,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:22:47,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:22:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:22:47,206 INFO L87 Difference]: Start difference. First operand 10918 states and 37324 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:26,858 INFO L93 Difference]: Finished difference Result 101348 states and 328669 transitions. [2022-03-15 16:23:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2022-03-15 16:23:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:23:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:27,420 INFO L225 Difference]: With dead ends: 101348 [2022-03-15 16:23:27,420 INFO L226 Difference]: Without dead ends: 99757 [2022-03-15 16:23:27,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166472 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=44693, Invalid=305179, Unknown=0, NotChecked=0, Total=349872 [2022-03-15 16:23:27,438 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2786 mSDsluCounter, 4485 mSDsCounter, 0 mSdLazyCounter, 7935 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 9949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 7935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1017 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:27,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 2109 Invalid, 9949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 7935 Invalid, 0 Unknown, 1017 Unchecked, 3.9s Time] [2022-03-15 16:23:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99757 states. [2022-03-15 16:23:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99757 to 11675. [2022-03-15 16:23:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11675 states, 11674 states have (on average 3.4306150419736166) internal successors, (40049), 11674 states have internal predecessors, (40049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 40049 transitions. [2022-03-15 16:23:28,550 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 40049 transitions. Word has length 44 [2022-03-15 16:23:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:28,551 INFO L470 AbstractCegarLoop]: Abstraction has 11675 states and 40049 transitions. [2022-03-15 16:23:28,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 40049 transitions. [2022-03-15 16:23:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:23:28,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:28,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:28,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:28,770 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,SelfDestructingSolverStorable12 [2022-03-15 16:23:28,770 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:23:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2066642255, now seen corresponding path program 10 times [2022-03-15 16:23:28,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:28,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179248748] [2022-03-15 16:23:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:29,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:29,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179248748] [2022-03-15 16:23:29,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179248748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:29,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559227993] [2022-03-15 16:23:29,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:23:29,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:29,071 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) [2022-03-15 16:23:29,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:23:29,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:23:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:29,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:23:29,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:29,545 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:23:29,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:23:29,624 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:23:29,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:23:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:29,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:29,923 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:23:29,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:23:30,180 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:23:30,180 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 58 [2022-03-15 16:23:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:30,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559227993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:30,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:30,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:23:30,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133819532] [2022-03-15 16:23:30,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:30,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:23:30,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:23:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:23:30,522 INFO L87 Difference]: Start difference. First operand 11675 states and 40049 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:56,668 INFO L93 Difference]: Finished difference Result 80755 states and 263729 transitions. [2022-03-15 16:23:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-03-15 16:23:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:23:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:56,908 INFO L225 Difference]: With dead ends: 80755 [2022-03-15 16:23:56,908 INFO L226 Difference]: Without dead ends: 78558 [2022-03-15 16:23:56,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88918 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=24364, Invalid=174998, Unknown=0, NotChecked=0, Total=199362 [2022-03-15 16:23:56,916 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3489 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 7534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 6434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:56,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 786 Invalid, 7534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-15 16:23:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78558 states. [2022-03-15 16:23:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78558 to 11362. [2022-03-15 16:23:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11362 states, 11361 states have (on average 3.423466244168647) internal successors, (38894), 11361 states have internal predecessors, (38894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11362 states to 11362 states and 38894 transitions. [2022-03-15 16:23:57,731 INFO L78 Accepts]: Start accepts. Automaton has 11362 states and 38894 transitions. Word has length 44 [2022-03-15 16:23:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:57,731 INFO L470 AbstractCegarLoop]: Abstraction has 11362 states and 38894 transitions. [2022-03-15 16:23:57,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 11362 states and 38894 transitions. [2022-03-15 16:23:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:23:57,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:57,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:57,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:57,949 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,SelfDestructingSolverStorable13 [2022-03-15 16:23:57,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:23:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1494512399, now seen corresponding path program 11 times [2022-03-15 16:23:57,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:57,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288684733] [2022-03-15 16:23:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:58,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:58,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288684733] [2022-03-15 16:23:58,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288684733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:58,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663489894] [2022-03-15 16:23:58,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:23:58,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:58,254 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) [2022-03-15 16:23:58,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:23:58,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:23:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:23:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:58,639 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:23:58,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:23:58,785 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:23:58,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:23:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:58,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:58,963 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:23:58,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:23:59,221 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:23:59,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:23:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:59,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663489894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:59,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:59,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-15 16:23:59,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396386852] [2022-03-15 16:23:59,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:59,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:23:59,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:23:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:23:59,473 INFO L87 Difference]: Start difference. First operand 11362 states and 38894 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:11,582 INFO L93 Difference]: Finished difference Result 42157 states and 138706 transitions. [2022-03-15 16:24:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-03-15 16:24:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:24:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:11,693 INFO L225 Difference]: With dead ends: 42157 [2022-03-15 16:24:11,694 INFO L226 Difference]: Without dead ends: 41447 [2022-03-15 16:24:11,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24671 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=9024, Invalid=55238, Unknown=0, NotChecked=0, Total=64262 [2022-03-15 16:24:11,701 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1602 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 6119 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 6593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 6119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:11,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 650 Invalid, 6593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 6119 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 16:24:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41447 states. [2022-03-15 16:24:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41447 to 11393. [2022-03-15 16:24:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11393 states, 11392 states have (on average 3.424683988764045) internal successors, (39014), 11392 states have internal predecessors, (39014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11393 states to 11393 states and 39014 transitions. [2022-03-15 16:24:12,169 INFO L78 Accepts]: Start accepts. Automaton has 11393 states and 39014 transitions. Word has length 44 [2022-03-15 16:24:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:12,170 INFO L470 AbstractCegarLoop]: Abstraction has 11393 states and 39014 transitions. [2022-03-15 16:24:12,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11393 states and 39014 transitions. [2022-03-15 16:24:12,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:24:12,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:12,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:12,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-15 16:24:12,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:24:12,389 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:24:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1850385115, now seen corresponding path program 12 times [2022-03-15 16:24:12,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:12,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415261729] [2022-03-15 16:24:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:12,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:12,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415261729] [2022-03-15 16:24:12,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415261729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:12,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271416641] [2022-03-15 16:24:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:12,655 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) [2022-03-15 16:24:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:24:12,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:24:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:24:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:13,016 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:13,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:24:13,159 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:13,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:24:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:13,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:13,338 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:13,338 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 58 [2022-03-15 16:24:13,646 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:13,647 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 58 [2022-03-15 16:24:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:13,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271416641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:13,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:13,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-15 16:24:13,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902735605] [2022-03-15 16:24:13,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:13,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:24:13,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:24:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:24:13,919 INFO L87 Difference]: Start difference. First operand 11393 states and 39014 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:18,051 INFO L93 Difference]: Finished difference Result 25242 states and 83256 transitions. [2022-03-15 16:24:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:24:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:24:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:18,112 INFO L225 Difference]: With dead ends: 25242 [2022-03-15 16:24:18,112 INFO L226 Difference]: Without dead ends: 24864 [2022-03-15 16:24:18,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2085, Invalid=11957, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:24:18,114 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1110 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 3823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:18,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 596 Invalid, 3823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:24:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24864 states. [2022-03-15 16:24:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24864 to 11332. [2022-03-15 16:24:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11332 states, 11331 states have (on average 3.4248521754478864) internal successors, (38807), 11331 states have internal predecessors, (38807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11332 states to 11332 states and 38807 transitions. [2022-03-15 16:24:18,456 INFO L78 Accepts]: Start accepts. Automaton has 11332 states and 38807 transitions. Word has length 44 [2022-03-15 16:24:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 11332 states and 38807 transitions. [2022-03-15 16:24:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 11332 states and 38807 transitions. [2022-03-15 16:24:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:24:18,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:18,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:18,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:18,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:24:18,673 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:24:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1937258375, now seen corresponding path program 13 times [2022-03-15 16:24:18,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:18,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251250003] [2022-03-15 16:24:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:18,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:18,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251250003] [2022-03-15 16:24:18,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251250003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:18,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641684844] [2022-03-15 16:24:18,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:24:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:18,946 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) [2022-03-15 16:24:18,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:24:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:24:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:19,299 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:19,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:24:19,452 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:19,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:24:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:19,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:19,655 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:19,656 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 34 treesize of output 58 [2022-03-15 16:24:19,938 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:19,938 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 58 [2022-03-15 16:24:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:20,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641684844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:20,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:20,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:24:20,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156181612] [2022-03-15 16:24:20,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:24:20,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:24:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:24:20,217 INFO L87 Difference]: Start difference. First operand 11332 states and 38807 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:26,324 INFO L93 Difference]: Finished difference Result 26568 states and 87720 transitions. [2022-03-15 16:24:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:24:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:24:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:26,389 INFO L225 Difference]: With dead ends: 26568 [2022-03-15 16:24:26,389 INFO L226 Difference]: Without dead ends: 26148 [2022-03-15 16:24:26,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6546 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3190, Invalid=17980, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 16:24:26,390 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1102 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 5196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 4916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:26,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 795 Invalid, 5196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 4916 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:24:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26148 states. [2022-03-15 16:24:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26148 to 11503. [2022-03-15 16:24:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.4241870978960183) internal successors, (39385), 11502 states have internal predecessors, (39385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 39385 transitions. [2022-03-15 16:24:26,680 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 39385 transitions. Word has length 44 [2022-03-15 16:24:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:26,680 INFO L470 AbstractCegarLoop]: Abstraction has 11503 states and 39385 transitions. [2022-03-15 16:24:26,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 39385 transitions. [2022-03-15 16:24:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:24:26,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:26,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:26,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:26,897 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,SelfDestructingSolverStorable16 [2022-03-15 16:24:26,897 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:24:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1019179365, now seen corresponding path program 14 times [2022-03-15 16:24:26,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:26,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881240250] [2022-03-15 16:24:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:27,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:27,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881240250] [2022-03-15 16:24:27,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881240250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:27,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238944690] [2022-03-15 16:24:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:24:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:27,173 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) [2022-03-15 16:24:27,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:24:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:24:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:24:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:27,528 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:27,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:24:27,669 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:27,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:24:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:27,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:27,920 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:27,920 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 58 [2022-03-15 16:24:28,179 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:28,180 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 58 [2022-03-15 16:24:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:28,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238944690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:28,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:28,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:24:28,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17888821] [2022-03-15 16:24:28,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:28,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:24:28,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:24:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:24:28,556 INFO L87 Difference]: Start difference. First operand 11503 states and 39385 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:44,645 INFO L93 Difference]: Finished difference Result 60197 states and 198437 transitions. [2022-03-15 16:24:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-03-15 16:24:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:24:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:44,822 INFO L225 Difference]: With dead ends: 60197 [2022-03-15 16:24:44,823 INFO L226 Difference]: Without dead ends: 59437 [2022-03-15 16:24:44,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36617 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=13366, Invalid=77536, Unknown=0, NotChecked=0, Total=90902 [2022-03-15 16:24:44,827 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2216 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 6660 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 7263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 6660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:44,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 610 Invalid, 7263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 6660 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 16:24:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59437 states. [2022-03-15 16:24:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59437 to 12041. [2022-03-15 16:24:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12041 states, 12040 states have (on average 3.4166112956810633) internal successors, (41136), 12040 states have internal predecessors, (41136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 41136 transitions. [2022-03-15 16:24:45,371 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 41136 transitions. Word has length 44 [2022-03-15 16:24:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:45,372 INFO L470 AbstractCegarLoop]: Abstraction has 12041 states and 41136 transitions. [2022-03-15 16:24:45,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 41136 transitions. [2022-03-15 16:24:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:24:45,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:45,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:45,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:45,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:45,594 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:24:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1074071849, now seen corresponding path program 15 times [2022-03-15 16:24:45,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:45,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839045424] [2022-03-15 16:24:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:46,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:46,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839045424] [2022-03-15 16:24:46,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839045424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:46,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26262021] [2022-03-15 16:24:46,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:24:46,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:46,029 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) [2022-03-15 16:24:46,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:24:46,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:24:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:46,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:24:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:46,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,640 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 27 treesize of output 19 [2022-03-15 16:24:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,737 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 27 treesize of output 13 [2022-03-15 16:24:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:46,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:47,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:47,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:47,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:24:47,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 48 [2022-03-15 16:24:47,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:47,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:47,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:24:47,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 54 [2022-03-15 16:24:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:47,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26262021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:47,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:47,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 50 [2022-03-15 16:24:47,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238057547] [2022-03-15 16:24:47,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:24:47,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:24:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:24:47,742 INFO L87 Difference]: Start difference. First operand 12041 states and 41136 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:55,704 INFO L93 Difference]: Finished difference Result 34676 states and 117325 transitions. [2022-03-15 16:24:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-15 16:24:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:24:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:55,800 INFO L225 Difference]: With dead ends: 34676 [2022-03-15 16:24:55,800 INFO L226 Difference]: Without dead ends: 34676 [2022-03-15 16:24:55,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15220 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4899, Invalid=36921, Unknown=0, NotChecked=0, Total=41820 [2022-03-15 16:24:55,804 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1262 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 7942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4768 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:55,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1262 Valid, 2554 Invalid, 7942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2958 Invalid, 0 Unknown, 4768 Unchecked, 1.3s Time] [2022-03-15 16:24:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2022-03-15 16:24:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 14680. [2022-03-15 16:24:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14680 states, 14679 states have (on average 3.4467606785203353) internal successors, (50595), 14679 states have internal predecessors, (50595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 50595 transitions. [2022-03-15 16:24:56,301 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 50595 transitions. Word has length 44 [2022-03-15 16:24:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:56,301 INFO L470 AbstractCegarLoop]: Abstraction has 14680 states and 50595 transitions. [2022-03-15 16:24:56,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 50595 transitions. [2022-03-15 16:24:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:24:56,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:56,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:56,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:56,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:56,539 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:24:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -698103635, now seen corresponding path program 16 times [2022-03-15 16:24:56,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:56,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340126631] [2022-03-15 16:24:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:56,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:56,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340126631] [2022-03-15 16:24:56,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340126631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:56,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428999294] [2022-03-15 16:24:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:56,826 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) [2022-03-15 16:24:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:24:56,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:56,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:24:56,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:57,284 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:57,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:24:57,382 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:24:57,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:24:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:57,644 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:57,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:24:57,927 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:24:57,927 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 58 [2022-03-15 16:24:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:58,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428999294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:58,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:58,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:24:58,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047129842] [2022-03-15 16:24:58,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:58,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:24:58,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:24:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:24:58,219 INFO L87 Difference]: Start difference. First operand 14680 states and 50595 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:06,244 INFO L93 Difference]: Finished difference Result 45385 states and 149970 transitions. [2022-03-15 16:25:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:25:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:25:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:06,491 INFO L225 Difference]: With dead ends: 45385 [2022-03-15 16:25:06,491 INFO L226 Difference]: Without dead ends: 44545 [2022-03-15 16:25:06,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10087 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4546, Invalid=26254, Unknown=0, NotChecked=0, Total=30800 [2022-03-15 16:25:06,493 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1603 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:06,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 606 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 16:25:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44545 states. [2022-03-15 16:25:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44545 to 12884. [2022-03-15 16:25:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12884 states, 12883 states have (on average 3.421175192113638) internal successors, (44075), 12883 states have internal predecessors, (44075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12884 states to 12884 states and 44075 transitions. [2022-03-15 16:25:06,971 INFO L78 Accepts]: Start accepts. Automaton has 12884 states and 44075 transitions. Word has length 44 [2022-03-15 16:25:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:06,971 INFO L470 AbstractCegarLoop]: Abstraction has 12884 states and 44075 transitions. [2022-03-15 16:25:06,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 12884 states and 44075 transitions. [2022-03-15 16:25:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:25:06,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:06,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:07,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 16:25:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:07,194 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:25:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -678348743, now seen corresponding path program 17 times [2022-03-15 16:25:07,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:07,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067317883] [2022-03-15 16:25:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:07,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:07,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067317883] [2022-03-15 16:25:07,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067317883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:07,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893214452] [2022-03-15 16:25:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:25:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:07,509 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) [2022-03-15 16:25:07,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:25:07,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:25:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:25:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:08,054 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:25:08,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:25:08,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:08,153 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 25 treesize of output 13 [2022-03-15 16:25:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:08,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:08,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:08,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:08,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:25:08,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-03-15 16:25:08,725 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:25:08,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-03-15 16:25:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:09,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893214452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:09,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:09,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:25:09,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063690933] [2022-03-15 16:25:09,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:09,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:25:09,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:25:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:25:09,034 INFO L87 Difference]: Start difference. First operand 12884 states and 44075 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:59,685 INFO L93 Difference]: Finished difference Result 100279 states and 326889 transitions. [2022-03-15 16:25:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-03-15 16:25:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:25:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:00,117 INFO L225 Difference]: With dead ends: 100279 [2022-03-15 16:26:00,117 INFO L226 Difference]: Without dead ends: 90653 [2022-03-15 16:26:00,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232505 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=56819, Invalid=433881, Unknown=0, NotChecked=0, Total=490700 [2022-03-15 16:26:00,135 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 2896 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 9593 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2896 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 11798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 9593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:00,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2896 Valid, 2016 Invalid, 11798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 9593 Invalid, 0 Unknown, 1208 Unchecked, 4.9s Time] [2022-03-15 16:26:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90653 states. [2022-03-15 16:26:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90653 to 15895. [2022-03-15 16:26:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 15894 states have (on average 3.4251289794891155) internal successors, (54439), 15894 states have internal predecessors, (54439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 54439 transitions. [2022-03-15 16:26:01,241 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 54439 transitions. Word has length 44 [2022-03-15 16:26:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:01,242 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 54439 transitions. [2022-03-15 16:26:01,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 54439 transitions. [2022-03-15 16:26:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:26:01,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:01,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:01,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:01,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:01,472 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:26:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash -77114961, now seen corresponding path program 18 times [2022-03-15 16:26:01,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:01,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386773483] [2022-03-15 16:26:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:01,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:01,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386773483] [2022-03-15 16:26:01,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386773483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:01,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983507282] [2022-03-15 16:26:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:26:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:01,787 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) [2022-03-15 16:26:01,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:26:01,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:26:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:26:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:02,260 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:26:02,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:26:02,418 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:26:02,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:26:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:02,717 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:26:02,717 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 58 [2022-03-15 16:26:02,924 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:26:02,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:26:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:03,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983507282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:03,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:03,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:26:03,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450739119] [2022-03-15 16:26:03,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:26:03,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:26:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:26:03,218 INFO L87 Difference]: Start difference. First operand 15895 states and 54439 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:43,588 INFO L93 Difference]: Finished difference Result 78559 states and 258414 transitions. [2022-03-15 16:26:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 592 states. [2022-03-15 16:26:43,589 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:26:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:43,859 INFO L225 Difference]: With dead ends: 78559 [2022-03-15 16:26:43,859 INFO L226 Difference]: Without dead ends: 77205 [2022-03-15 16:26:43,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 634 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183905 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=40385, Invalid=363475, Unknown=0, NotChecked=0, Total=403860 [2022-03-15 16:26:43,877 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1924 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 9893 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 10576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 9893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:43,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 1468 Invalid, 10576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 9893 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-15 16:26:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77205 states. [2022-03-15 16:26:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77205 to 16001. [2022-03-15 16:26:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16001 states, 16000 states have (on average 3.43) internal successors, (54880), 16000 states have internal predecessors, (54880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16001 states to 16001 states and 54880 transitions. [2022-03-15 16:26:44,850 INFO L78 Accepts]: Start accepts. Automaton has 16001 states and 54880 transitions. Word has length 44 [2022-03-15 16:26:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 16001 states and 54880 transitions. [2022-03-15 16:26:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16001 states and 54880 transitions. [2022-03-15 16:26:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:26:44,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:44,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:44,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:45,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:45,080 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:26:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash 860665313, now seen corresponding path program 19 times [2022-03-15 16:26:45,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:45,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715206781] [2022-03-15 16:26:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:45,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:45,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715206781] [2022-03-15 16:26:45,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715206781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656080014] [2022-03-15 16:26:45,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:26:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:45,411 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) [2022-03-15 16:26:45,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:26:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:26:45,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:45,945 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:26:45,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:26:46,056 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:26:46,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:26:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:46,478 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:26:46,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:26:46,715 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:26:46,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:26:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:46,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656080014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:46,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:46,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:26:46,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140872332] [2022-03-15 16:26:46,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:26:46,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:26:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:26:46,988 INFO L87 Difference]: Start difference. First operand 16001 states and 54880 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:28,138 INFO L93 Difference]: Finished difference Result 80996 states and 264692 transitions. [2022-03-15 16:27:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 570 states. [2022-03-15 16:27:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:27:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:28,438 INFO L225 Difference]: With dead ends: 80996 [2022-03-15 16:27:28,439 INFO L226 Difference]: Without dead ends: 79005 [2022-03-15 16:27:28,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173054 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=39432, Invalid=338178, Unknown=0, NotChecked=0, Total=377610 [2022-03-15 16:27:28,453 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2315 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 9990 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 10750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 9990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:28,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2315 Valid, 1395 Invalid, 10750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 9990 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-15 16:27:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79005 states. [2022-03-15 16:27:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79005 to 15733. [2022-03-15 16:27:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 3.4367531146707346) internal successors, (54067), 15732 states have internal predecessors, (54067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 54067 transitions. [2022-03-15 16:27:29,430 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 54067 transitions. Word has length 44 [2022-03-15 16:27:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:29,430 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 54067 transitions. [2022-03-15 16:27:29,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 54067 transitions. [2022-03-15 16:27:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:27:29,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:29,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:29,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:29,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:29,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:27:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1391795877, now seen corresponding path program 20 times [2022-03-15 16:27:29,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:29,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358921627] [2022-03-15 16:27:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:30,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:30,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358921627] [2022-03-15 16:27:30,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358921627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:30,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733438671] [2022-03-15 16:27:30,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:27:30,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:30,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:30,024 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) [2022-03-15 16:27:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:27:30,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:27:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:27:30,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:30,482 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:27:30,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:27:30,620 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:27:30,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:27:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:30,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:30,892 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:27:30,893 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 58 [2022-03-15 16:27:31,136 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:27:31,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:27:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:31,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733438671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:31,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:31,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-15 16:27:31,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326922645] [2022-03-15 16:27:31,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:31,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:27:31,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:27:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:27:31,406 INFO L87 Difference]: Start difference. First operand 15733 states and 54067 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:52,800 INFO L93 Difference]: Finished difference Result 63955 states and 209608 transitions. [2022-03-15 16:27:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2022-03-15 16:27:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:27:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:52,976 INFO L225 Difference]: With dead ends: 63955 [2022-03-15 16:27:52,976 INFO L226 Difference]: Without dead ends: 63155 [2022-03-15 16:27:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69376 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=19259, Invalid=140341, Unknown=0, NotChecked=0, Total=159600 [2022-03-15 16:27:52,982 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1995 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 6981 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 7659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 6981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:52,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1995 Valid, 779 Invalid, 7659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 6981 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-15 16:27:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63155 states. [2022-03-15 16:27:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63155 to 16979. [2022-03-15 16:27:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.4392743550477087) internal successors, (58392), 16978 states have internal predecessors, (58392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 58392 transitions. [2022-03-15 16:27:53,824 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 58392 transitions. Word has length 44 [2022-03-15 16:27:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:53,825 INFO L470 AbstractCegarLoop]: Abstraction has 16979 states and 58392 transitions. [2022-03-15 16:27:53,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 58392 transitions. [2022-03-15 16:27:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:27:53,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:53,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:54,054 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,SelfDestructingSolverStorable23 [2022-03-15 16:27:54,056 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:27:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 884472071, now seen corresponding path program 21 times [2022-03-15 16:27:54,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:54,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787038268] [2022-03-15 16:27:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:54,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:54,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:54,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787038268] [2022-03-15 16:27:54,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787038268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:54,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471658023] [2022-03-15 16:27:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:27:54,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:54,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:54,367 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) [2022-03-15 16:27:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:27:54,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:27:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:27:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:54,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:54,777 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:27:54,915 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:27:54,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:27:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:54,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:55,219 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:27:55,219 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 58 [2022-03-15 16:27:55,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:55,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:55,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:27:55,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-03-15 16:27:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:55,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471658023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:55,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:55,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:27:55,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547048112] [2022-03-15 16:27:55,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:55,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:27:55,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:27:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:27:55,845 INFO L87 Difference]: Start difference. First operand 16979 states and 58392 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:35,284 INFO L93 Difference]: Finished difference Result 102003 states and 332162 transitions. [2022-03-15 16:28:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2022-03-15 16:28:35,284 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:28:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:35,668 INFO L225 Difference]: With dead ends: 102003 [2022-03-15 16:28:35,669 INFO L226 Difference]: Without dead ends: 100211 [2022-03-15 16:28:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180537 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=45817, Invalid=342935, Unknown=0, NotChecked=0, Total=388752 [2022-03-15 16:28:35,684 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2287 mSDsluCounter, 3956 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 11552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 9383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1418 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:35,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 1439 Invalid, 11552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 9383 Invalid, 0 Unknown, 1418 Unchecked, 4.4s Time] [2022-03-15 16:28:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100211 states. [2022-03-15 16:28:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100211 to 17668. [2022-03-15 16:28:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17668 states, 17667 states have (on average 3.4446142525612724) internal successors, (60856), 17667 states have internal predecessors, (60856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17668 states to 17668 states and 60856 transitions. [2022-03-15 16:28:36,825 INFO L78 Accepts]: Start accepts. Automaton has 17668 states and 60856 transitions. Word has length 44 [2022-03-15 16:28:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:36,825 INFO L470 AbstractCegarLoop]: Abstraction has 17668 states and 60856 transitions. [2022-03-15 16:28:36,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 17668 states and 60856 transitions. [2022-03-15 16:28:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:28:36,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:36,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:36,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:37,055 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,SelfDestructingSolverStorable24 [2022-03-15 16:28:37,055 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:28:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash -33606939, now seen corresponding path program 22 times [2022-03-15 16:28:37,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:37,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613084605] [2022-03-15 16:28:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:37,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:37,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:37,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613084605] [2022-03-15 16:28:37,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613084605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:37,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886380636] [2022-03-15 16:28:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:28:37,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:37,365 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) [2022-03-15 16:28:37,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:28:37,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:28:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:28:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:37,841 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:28:37,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:28:37,996 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:28:37,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:28:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:38,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:38,290 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:28:38,290 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 58 [2022-03-15 16:28:38,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:28:38,514 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 58 [2022-03-15 16:28:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:38,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886380636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:38,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:38,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:28:38,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544575769] [2022-03-15 16:28:38,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:28:38,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:28:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:28:38,778 INFO L87 Difference]: Start difference. First operand 17668 states and 60856 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:17,128 INFO L93 Difference]: Finished difference Result 109389 states and 358634 transitions. [2022-03-15 16:29:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 563 states. [2022-03-15 16:29:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:29:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:17,546 INFO L225 Difference]: With dead ends: 109389 [2022-03-15 16:29:17,547 INFO L226 Difference]: Without dead ends: 106874 [2022-03-15 16:29:17,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 606 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169281 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=39171, Invalid=329885, Unknown=0, NotChecked=0, Total=369056 [2022-03-15 16:29:17,563 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2699 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 8512 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 9504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 8512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:17,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 866 Invalid, 9504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 8512 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-15 16:29:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106874 states. [2022-03-15 16:29:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106874 to 18383. [2022-03-15 16:29:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18383 states, 18382 states have (on average 3.444837340876945) internal successors, (63323), 18382 states have internal predecessors, (63323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18383 states to 18383 states and 63323 transitions. [2022-03-15 16:29:18,811 INFO L78 Accepts]: Start accepts. Automaton has 18383 states and 63323 transitions. Word has length 44 [2022-03-15 16:29:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 18383 states and 63323 transitions. [2022-03-15 16:29:18,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18383 states and 63323 transitions. [2022-03-15 16:29:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:29:18,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:18,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:18,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 16:29:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:29:19,041 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:29:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash 272930747, now seen corresponding path program 23 times [2022-03-15 16:29:19,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:19,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862464479] [2022-03-15 16:29:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:19,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:19,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:19,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862464479] [2022-03-15 16:29:19,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862464479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:19,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794377718] [2022-03-15 16:29:19,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:29:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:19,338 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) [2022-03-15 16:29:19,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:29:19,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:29:19,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:29:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:19,787 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:29:19,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:29:19,897 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:29:19,897 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 27 treesize of output 15 [2022-03-15 16:29:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:19,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:20,167 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:29:20,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:29:20,450 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:29:20,451 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 58 [2022-03-15 16:29:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:20,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794377718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:20,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:20,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-15 16:29:20,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255306469] [2022-03-15 16:29:20,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:29:20,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:29:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1982, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:29:20,643 INFO L87 Difference]: Start difference. First operand 18383 states and 63323 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:41,159 INFO L93 Difference]: Finished difference Result 84029 states and 275540 transitions. [2022-03-15 16:29:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 353 states. [2022-03-15 16:29:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:29:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:41,427 INFO L225 Difference]: With dead ends: 84029 [2022-03-15 16:29:41,427 INFO L226 Difference]: Without dead ends: 82831 [2022-03-15 16:29:41,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68230 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18314, Invalid=138898, Unknown=0, NotChecked=0, Total=157212 [2022-03-15 16:29:41,434 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1698 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 6059 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 6689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 6059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:41,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 726 Invalid, 6689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 6059 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:29:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82831 states. [2022-03-15 16:29:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82831 to 18613. [2022-03-15 16:29:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18613 states, 18612 states have (on average 3.445733935095637) internal successors, (64132), 18612 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18613 states to 18613 states and 64132 transitions. [2022-03-15 16:29:42,497 INFO L78 Accepts]: Start accepts. Automaton has 18613 states and 64132 transitions. Word has length 44 [2022-03-15 16:29:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:42,498 INFO L470 AbstractCegarLoop]: Abstraction has 18613 states and 64132 transitions. [2022-03-15 16:29:42,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 18613 states and 64132 transitions. [2022-03-15 16:29:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:29:42,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:42,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:42,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:42,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:42,728 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:29:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:42,729 INFO L85 PathProgramCache]: Analyzing trace with hash -645148263, now seen corresponding path program 24 times [2022-03-15 16:29:42,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:42,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099287833] [2022-03-15 16:29:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:43,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:43,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099287833] [2022-03-15 16:29:43,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099287833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:43,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319842152] [2022-03-15 16:29:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:29:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:43,048 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) [2022-03-15 16:29:43,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:29:43,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:29:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:29:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:43,530 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:29:43,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:29:43,649 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:29:43,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:29:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:43,973 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:29:43,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:29:44,204 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:29:44,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:29:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:44,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319842152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:44,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:44,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:29:44,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894725398] [2022-03-15 16:29:44,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:44,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:29:44,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:29:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:29:44,481 INFO L87 Difference]: Start difference. First operand 18613 states and 64132 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:17,963 INFO L93 Difference]: Finished difference Result 103092 states and 337501 transitions. [2022-03-15 16:30:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 489 states. [2022-03-15 16:30:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:30:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:18,344 INFO L225 Difference]: With dead ends: 103092 [2022-03-15 16:30:18,345 INFO L226 Difference]: Without dead ends: 101564 [2022-03-15 16:30:18,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127959 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=31003, Invalid=253619, Unknown=0, NotChecked=0, Total=284622 [2022-03-15 16:30:18,357 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2352 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 8721 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 9515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 8721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:18,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2352 Valid, 841 Invalid, 9515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 8721 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-15 16:30:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101564 states. [2022-03-15 16:30:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101564 to 18510. [2022-03-15 16:30:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18510 states, 18509 states have (on average 3.4462693824625856) internal successors, (63787), 18509 states have internal predecessors, (63787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18510 states to 18510 states and 63787 transitions. [2022-03-15 16:30:19,505 INFO L78 Accepts]: Start accepts. Automaton has 18510 states and 63787 transitions. Word has length 44 [2022-03-15 16:30:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:19,505 INFO L470 AbstractCegarLoop]: Abstraction has 18510 states and 63787 transitions. [2022-03-15 16:30:19,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 18510 states and 63787 transitions. [2022-03-15 16:30:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:30:19,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:19,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:19,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:19,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:30:19,734 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:30:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash 21285545, now seen corresponding path program 25 times [2022-03-15 16:30:19,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:19,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203648873] [2022-03-15 16:30:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:20,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:20,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203648873] [2022-03-15 16:30:20,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203648873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:20,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436240994] [2022-03-15 16:30:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:30:20,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:20,175 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) [2022-03-15 16:30:20,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:30:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:30:20,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:20,634 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:30:20,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-15 16:30:20,711 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:30:20,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:30:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:20,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:21,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:30:21,027 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 58 [2022-03-15 16:30:21,282 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:30:21,283 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 34 treesize of output 58 [2022-03-15 16:30:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:21,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436240994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:21,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:21,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-15 16:30:21,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027143657] [2022-03-15 16:30:21,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:30:21,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:30:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:30:21,578 INFO L87 Difference]: Start difference. First operand 18510 states and 63787 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:49,695 INFO L93 Difference]: Finished difference Result 91296 states and 298389 transitions. [2022-03-15 16:30:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 425 states. [2022-03-15 16:30:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:30:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:49,962 INFO L225 Difference]: With dead ends: 91296 [2022-03-15 16:30:49,962 INFO L226 Difference]: Without dead ends: 89183 [2022-03-15 16:30:49,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98758 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=25938, Invalid=194492, Unknown=0, NotChecked=0, Total=220430 [2022-03-15 16:30:49,973 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2540 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 8443 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2540 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 9242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 8443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:49,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2540 Valid, 852 Invalid, 9242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 8443 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-15 16:30:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89183 states. [2022-03-15 16:30:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89183 to 17991. [2022-03-15 16:30:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17991 states, 17990 states have (on average 3.4312951639799887) internal successors, (61729), 17990 states have internal predecessors, (61729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 61729 transitions. [2022-03-15 16:30:51,013 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 61729 transitions. Word has length 44 [2022-03-15 16:30:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:51,013 INFO L470 AbstractCegarLoop]: Abstraction has 17991 states and 61729 transitions. [2022-03-15 16:30:51,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 61729 transitions. [2022-03-15 16:30:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:30:51,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:51,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:51,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:51,243 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,SelfDestructingSolverStorable28 [2022-03-15 16:30:51,243 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:30:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -550844311, now seen corresponding path program 26 times [2022-03-15 16:30:51,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:51,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050449685] [2022-03-15 16:30:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:51,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:51,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050449685] [2022-03-15 16:30:51,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050449685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:51,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127784866] [2022-03-15 16:30:51,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:30:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:51,528 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) [2022-03-15 16:30:51,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:30:51,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:30:51,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:30:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:51,916 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 16:30:51,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-03-15 16:30:52,066 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:30:52,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:30:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:52,245 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:30:52,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2022-03-15 16:30:52,527 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:30:52,528 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 34 treesize of output 58 [2022-03-15 16:30:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:52,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127784866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:52,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:52,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-15 16:30:52,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078739525] [2022-03-15 16:30:52,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:30:52,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:30:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:30:52,839 INFO L87 Difference]: Start difference. First operand 17991 states and 61729 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:31:03,849 INFO L93 Difference]: Finished difference Result 45577 states and 151235 transitions. [2022-03-15 16:31:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-15 16:31:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 16:31:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:31:03,979 INFO L225 Difference]: With dead ends: 45577 [2022-03-15 16:31:03,979 INFO L226 Difference]: Without dead ends: 44903 [2022-03-15 16:31:03,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18819 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=7135, Invalid=44167, Unknown=0, NotChecked=0, Total=51302 [2022-03-15 16:31:03,983 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1300 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 6916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:03,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 713 Invalid, 6916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 6527 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-15 16:31:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44903 states. [2022-03-15 16:31:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44903 to 17776. [2022-03-15 16:31:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17776 states, 17775 states have (on average 3.437974683544304) internal successors, (61110), 17775 states have internal predecessors, (61110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17776 states to 17776 states and 61110 transitions. [2022-03-15 16:31:04,507 INFO L78 Accepts]: Start accepts. Automaton has 17776 states and 61110 transitions. Word has length 44 [2022-03-15 16:31:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:31:04,508 INFO L470 AbstractCegarLoop]: Abstraction has 17776 states and 61110 transitions. [2022-03-15 16:31:04,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17776 states and 61110 transitions. [2022-03-15 16:31:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 16:31:04,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:31:04,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:31:04,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:31:04,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:31:04,735 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:31:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:31:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash -979534053, now seen corresponding path program 27 times [2022-03-15 16:31:04,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:31:04,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717936674] [2022-03-15 16:31:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:31:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:31:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:31:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:31:05,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:31:05,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717936674] [2022-03-15 16:31:05,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717936674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:31:05,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217780456] [2022-03-15 16:31:05,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:31:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:31:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:31:05,029 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) [2022-03-15 16:31:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:31:05,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:31:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:31:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:31:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:31:05,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:05,517 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 19 [2022-03-15 16:31:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:05,606 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 25 treesize of output 13 [2022-03-15 16:31:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:31:06,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:06,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:06,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:31:06,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-03-15 16:31:06,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:06,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:06,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:31:06,327 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 32 treesize of output 48 [2022-03-15 16:31:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:06,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217780456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:31:06,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:31:06,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2022-03-15 16:31:06,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857630831] [2022-03-15 16:31:06,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:31:06,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:31:06,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:31:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:31:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:31:06,754 INFO L87 Difference]: Start difference. First operand 17776 states and 61110 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 16:31:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 661 states. [2022-03-15 16:31:58,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 704 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251650 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=72852, Invalid=424878, Unknown=0, NotChecked=0, Total=497730 [2022-03-15 16:31:58,437 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 3944 mSDsluCounter, 4721 mSDsCounter, 0 mSdLazyCounter, 8436 mSolverCounterSat, 1383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3944 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 13350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1383 IncrementalHoareTripleChecker+Valid, 8436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3531 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:58,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3944 Valid, 2169 Invalid, 13350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1383 Valid, 8436 Invalid, 0 Unknown, 3531 Unchecked, 4.4s Time] [2022-03-15 16:31:58,438 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-03-15 16:31:58,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:31:58,458 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:31:58,458 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 [2022-03-15 16:31:58,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:31:58,648 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. [2022-03-15 16:31:58,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-03-15 16:31:58,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-03-15 16:31:58,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-03-15 16:31:58,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-03-15 16:31:58,651 INFO L732 BasicCegarLoop]: Path program histogram: [27, 2, 1, 1] [2022-03-15 16:31:58,653 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:31:58,653 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:31:58,654 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:31:58 BasicIcfg [2022-03-15 16:31:58,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:31:58,654 INFO L158 Benchmark]: Toolchain (without parser) took 731873.75ms. Allocated memory was 202.4MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 161.2MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-03-15 16:31:58,654 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 202.4MB. Free memory is still 162.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:31:58,654 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.99ms. Allocated memory is still 202.4MB. Free memory was 161.1MB in the beginning and 159.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:31:58,655 INFO L158 Benchmark]: Boogie Preprocessor took 12.93ms. Allocated memory is still 202.4MB. Free memory was 159.6MB in the beginning and 158.6MB in the end (delta: 941.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:31:58,655 INFO L158 Benchmark]: RCFGBuilder took 226.73ms. Allocated memory is still 202.4MB. Free memory was 158.5MB in the beginning and 148.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:31:58,655 INFO L158 Benchmark]: TraceAbstraction took 731604.69ms. Allocated memory was 202.4MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 148.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-03-15 16:31:58,655 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 0.11ms. Allocated memory is still 202.4MB. Free memory is still 162.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.99ms. Allocated memory is still 202.4MB. Free memory was 161.1MB in the beginning and 159.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.93ms. Allocated memory is still 202.4MB. Free memory was 159.6MB in the beginning and 158.6MB in the end (delta: 941.6kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 226.73ms. Allocated memory is still 202.4MB. Free memory was 158.5MB in the beginning and 148.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 731604.69ms. Allocated memory was 202.4MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 148.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.6GB. 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: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 661 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 706 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 731.5s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.6s, AutomataDifference: 662.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57124 SdHoareTripleChecker+Valid, 82.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57124 mSDsluCounter, 30977 SdHoareTripleChecker+Invalid, 70.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12131 IncrementalHoareTripleChecker+Unchecked, 74949 mSDsCounter, 18760 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 173680 IncrementalHoareTripleChecker+Invalid, 204571 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18760 mSolverCounterUnsat, 1522 mSDtfsCounter, 173680 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12615 GetRequests, 1747 SyntacticMatches, 18 SemanticMatches, 10849 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615802 ImplicationChecksByTransitivity, 562.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18613occurred in iteration=27, InterpolantAutomatonStates: 9171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 18.6s AutomataMinimizationTime, 30 MinimizatonAttempts, 1269531 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 42.7s InterpolantComputationTime, 2442 NumberOfCodeBlocks, 2442 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 3449 ConstructedInterpolants, 28 QuantifiedInterpolants, 43040 SizeOfPredicates, 507 NumberOfNonLiveVariables, 3184 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 83 InterpolantComputations, 6 PerfectInterpolantSequences, 277/1202 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