/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:42:13,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:42:13,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:42:13,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:42:13,369 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 16:42:13,384 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:42:13,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:42:13,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:42:13,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:42:13,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:42:13,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:42:13,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:42:13,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:42:13,386 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:42:13,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:42:13,386 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:42:13,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:42:13,387 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:42:13,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:42:13,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:42:13,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:42:13,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:42:13,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:42:13,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:42:13,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:42:13,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:42:13,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:42:13,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:42:13,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:42:13,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:42:13,591 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:42:13,594 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:42:13,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2022-03-15 16:42:13,595 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2022-03-15 16:42:13,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:42:13,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:42:13,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:42:13,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:42:13,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:42:13,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,658 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:42:13,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:42:13,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:42:13,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:42:13,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:42:13,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:42:13,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:42:13,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:42:13,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:42:13,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/1) ... [2022-03-15 16:42:13,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:42:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:13,709 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 16:42:13,728 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 16:42:13,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:42:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:42:13,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:42:13,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:42:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:42:13,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:42:13,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:42:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:42:13,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:42:13,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:42:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:42:13,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:42:13,744 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 16:42:13,778 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:42:13,779 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:42:13,881 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:42:13,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:42:13,891 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:42:13,892 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:42:13 BoogieIcfgContainer [2022-03-15 16:42:13,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:42:13,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:42:13,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:42:13,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:42:13,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:42:13" (1/2) ... [2022-03-15 16:42:13,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d597bd6 and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:42:13, skipping insertion in model container [2022-03-15 16:42:13,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:42:13" (2/2) ... [2022-03-15 16:42:13,919 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2022-03-15 16:42:13,922 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:42:13,922 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:42:13,922 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:42:13,922 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:42:13,968 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:42:14,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:42:14,032 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 16:42:14,032 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:42:14,038 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-15 16:42:14,073 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 16:42:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 16:42:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:42:14,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:14,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:14,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash -798073446, now seen corresponding path program 1 times [2022-03-15 16:42:14,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588440171] [2022-03-15 16:42:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,202 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 16:42:14,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588440171] [2022-03-15 16:42:14,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588440171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:42:14,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:42:14,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:42:14,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288159197] [2022-03-15 16:42:14,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:42:14,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:42:14,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:42:14,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:42:14,227 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:14,263 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-15 16:42:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:42:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:42:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:14,279 INFO L225 Difference]: With dead ends: 217 [2022-03-15 16:42:14,279 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 16:42:14,280 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 16:42:14,283 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:14,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:42:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 16:42:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-15 16:42:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 16:42:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-15 16:42:14,354 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-15 16:42:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-15 16:42:14,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-15 16:42:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:42:14,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:14,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:14,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:42:14,357 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash 216086682, now seen corresponding path program 1 times [2022-03-15 16:42:14,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315775720] [2022-03-15 16:42:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:14,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315775720] [2022-03-15 16:42:14,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315775720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:42:14,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:42:14,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:42:14,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052392021] [2022-03-15 16:42:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:42:14,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:42:14,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:42:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:42:14,450 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 16:42:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:14,527 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-15 16:42:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:42:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:42:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:14,529 INFO L225 Difference]: With dead ends: 158 [2022-03-15 16:42:14,530 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 16:42:14,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:42:14,531 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:14,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 16:42:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-15 16:42:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 16:42:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-15 16:42:14,541 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-15 16:42:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:14,542 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-15 16:42:14,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 16:42:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-15 16:42:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:42:14,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:14,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:14,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:42:14,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 924693880, now seen corresponding path program 1 times [2022-03-15 16:42:14,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809957697] [2022-03-15 16:42:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:14,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809957697] [2022-03-15 16:42:14,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809957697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:42:14,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:42:14,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:42:14,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890224842] [2022-03-15 16:42:14,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:42:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:42:14,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:42:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:42:14,586 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 16:42:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:14,626 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-15 16:42:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:42:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:42:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:14,628 INFO L225 Difference]: With dead ends: 183 [2022-03-15 16:42:14,628 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 16:42:14,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:42:14,629 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:14,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:42:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 16:42:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-15 16:42:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 16:42:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-15 16:42:14,638 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-15 16:42:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-15 16:42:14,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 16:42:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-15 16:42:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:14,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:14,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:14,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:42:14,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 575000696, now seen corresponding path program 1 times [2022-03-15 16:42:14,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841049553] [2022-03-15 16:42:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841049553] [2022-03-15 16:42:14,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841049553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:14,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886791972] [2022-03-15 16:42:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:14,912 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 16:42:14,913 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 16:42:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:42:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,284 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-03-15 16:42:15,293 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 16:42:15,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 [2022-03-15 16:42:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:15,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:15,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-15 16:42:15,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:15,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:15,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:15,497 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:15,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:15,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886791972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:15,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:15,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 16:42:15,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522423354] [2022-03-15 16:42:15,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:15,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:15,597 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:15,849 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-15 16:42:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:42:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:15,851 INFO L225 Difference]: With dead ends: 366 [2022-03-15 16:42:15,851 INFO L226 Difference]: Without dead ends: 351 [2022-03-15 16:42:15,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:42:15,852 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:15,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-15 16:42:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-15 16:42:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 16:42:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-15 16:42:15,873 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-15 16:42:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:15,874 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-15 16:42:15,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-15 16:42:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:15,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:15,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:15,904 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 16:42:16,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:16,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 407191604, now seen corresponding path program 2 times [2022-03-15 16:42:16,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:16,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862615530] [2022-03-15 16:42:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:16,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862615530] [2022-03-15 16:42:16,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862615530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:16,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165103083] [2022-03-15 16:42:16,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:16,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:16,293 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 16:42:16,295 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 16:42:16,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:16,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:16,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:42:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:16,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,508 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 31 [2022-03-15 16:42:16,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-15 16:42:16,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-15 16:42:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:16,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-15 16:42:16,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:16,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:16,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:16,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:16,807 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:16,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:16,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165103083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:16,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:16,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-03-15 16:42:16,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376148671] [2022-03-15 16:42:16,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:16,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:42:16,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:16,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:42:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:42:16,893 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 16:42:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:17,406 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-15 16:42:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:17,408 INFO L225 Difference]: With dead ends: 478 [2022-03-15 16:42:17,408 INFO L226 Difference]: Without dead ends: 463 [2022-03-15 16:42:17,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:42:17,410 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:17,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 97 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-15 16:42:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-15 16:42:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 16:42:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-15 16:42:17,433 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-15 16:42:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:17,433 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-15 16:42:17,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 16:42:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-15 16:42:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:17,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:17,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:17,467 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 16:42:17,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:17,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 705965052, now seen corresponding path program 3 times [2022-03-15 16:42:17,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:17,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146149216] [2022-03-15 16:42:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:17,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:17,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146149216] [2022-03-15 16:42:17,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146149216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:17,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714158602] [2022-03-15 16:42:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:17,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:17,799 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 16:42:17,815 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 16:42:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:42:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:42:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:17,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-03-15 16:42:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:18,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:18,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:18,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-15 16:42:18,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:18,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:18,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:18,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:18,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:18,144 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:18,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:18,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714158602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:18,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:18,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:42:18,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539217013] [2022-03-15 16:42:18,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:18,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:42:18,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:42:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:18,260 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:42:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:18,525 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-15 16:42:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:42:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:18,528 INFO L225 Difference]: With dead ends: 418 [2022-03-15 16:42:18,528 INFO L226 Difference]: Without dead ends: 403 [2022-03-15 16:42:18,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:42:18,529 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:18,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-15 16:42:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-15 16:42:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 16:42:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-15 16:42:18,536 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-15 16:42:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:18,536 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-15 16:42:18,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 16:42:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-15 16:42:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:18,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:18,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:18,554 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 16:42:18,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:18,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2018176644, now seen corresponding path program 4 times [2022-03-15 16:42:18,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:18,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029776387] [2022-03-15 16:42:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:18,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:18,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029776387] [2022-03-15 16:42:18,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029776387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:18,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810286369] [2022-03-15 16:42:18,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:18,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:18,879 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 16:42:18,902 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 16:42:18,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:42:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:19,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 35 [2022-03-15 16:42:19,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 [2022-03-15 16:42:19,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-15 16:42:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:19,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-15 16:42:19,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:19,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:19,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:19,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:19,363 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:19,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:19,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810286369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:19,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:19,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:42:19,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532828700] [2022-03-15 16:42:19,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:19,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:19,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:19,478 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:19,650 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-15 16:42:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:42:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:19,652 INFO L225 Difference]: With dead ends: 381 [2022-03-15 16:42:19,652 INFO L226 Difference]: Without dead ends: 366 [2022-03-15 16:42:19,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:42:19,653 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:19,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-15 16:42:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-15 16:42:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-15 16:42:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 16:42:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-15 16:42:19,659 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-15 16:42:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:19,660 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-15 16:42:19,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-15 16:42:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:19,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:19,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:19,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:19,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:19,861 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 29371358, now seen corresponding path program 5 times [2022-03-15 16:42:19,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:19,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123285440] [2022-03-15 16:42:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:19,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:20,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:20,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123285440] [2022-03-15 16:42:20,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123285440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:20,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080297381] [2022-03-15 16:42:20,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:20,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:20,005 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 16:42:20,014 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 16:42:20,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:20,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:42:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:20,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,235 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-03-15 16:42:20,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 61 [2022-03-15 16:42:20,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,251 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 16 treesize of output 21 [2022-03-15 16:42:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:20,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:20,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,529 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 24 treesize of output 29 [2022-03-15 16:42:20,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:20,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:20,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:20,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:20,605 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:20,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:20,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080297381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:20,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:20,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-15 16:42:20,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430034436] [2022-03-15 16:42:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:20,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:42:20,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:42:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:20,741 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 16:42:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:24,990 INFO L93 Difference]: Finished difference Result 1134 states and 3376 transitions. [2022-03-15 16:42:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:42:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:25,012 INFO L225 Difference]: With dead ends: 1134 [2022-03-15 16:42:25,012 INFO L226 Difference]: Without dead ends: 1119 [2022-03-15 16:42:25,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2044, Invalid=7856, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:42:25,014 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 547 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:25,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 238 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 691 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2022-03-15 16:42:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-15 16:42:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2022-03-15 16:42:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 16:42:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-03-15 16:42:25,041 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-03-15 16:42:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:25,043 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-03-15 16:42:25,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 16:42:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-03-15 16:42:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:42:25,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:25,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:25,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 16:42:25,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:25,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1593497758, now seen corresponding path program 6 times [2022-03-15 16:42:25,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:25,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230311085] [2022-03-15 16:42:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:25,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:25,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230311085] [2022-03-15 16:42:25,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230311085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:25,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206729367] [2022-03-15 16:42:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:25,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:25,372 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 16:42:25,373 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 16:42:25,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:42:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:42:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:25,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,543 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-03-15 16:42:25,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-03-15 16:42:25,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-15 16:42:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:25,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:25,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-15 16:42:25,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 24 [2022-03-15 16:42:25,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:25,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:42:25,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:42:25,788 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-15 16:42:25,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-03-15 16:42:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:25,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206729367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:25,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:25,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-15 16:42:25,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163067862] [2022-03-15 16:42:25,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:25,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:25,870 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:26,581 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-03-15 16:42:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:42:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:42:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:26,584 INFO L225 Difference]: With dead ends: 585 [2022-03-15 16:42:26,584 INFO L226 Difference]: Without dead ends: 570 [2022-03-15 16:42:26,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:42:26,585 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:26,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-15 16:42:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-03-15 16:42:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 16:42:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-03-15 16:42:26,591 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-03-15 16:42:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:26,591 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-03-15 16:42:26,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-03-15 16:42:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:26,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:26,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:26,616 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 16:42:26,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:26,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:26,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1804181270, now seen corresponding path program 7 times [2022-03-15 16:42:26,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:26,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019221898] [2022-03-15 16:42:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:26,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:26,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019221898] [2022-03-15 16:42:26,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019221898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:26,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494760344] [2022-03-15 16:42:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:26,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:26,832 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 16:42:26,833 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 16:42:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:27,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494760344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:27,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:27,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:42:27,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461170044] [2022-03-15 16:42:27,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:27,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:42:27,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:42:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:27,034 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 16:42:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:27,747 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-03-15 16:42:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:42:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 16:42:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:27,752 INFO L225 Difference]: With dead ends: 1123 [2022-03-15 16:42:27,752 INFO L226 Difference]: Without dead ends: 1123 [2022-03-15 16:42:27,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:42:27,753 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:27,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 200 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-15 16:42:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-03-15 16:42:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 16:42:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-03-15 16:42:27,764 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-03-15 16:42:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:27,765 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-03-15 16:42:27,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 16:42:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-03-15 16:42:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:27,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:27,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:27,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 16:42:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:27,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 827862426, now seen corresponding path program 8 times [2022-03-15 16:42:27,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:27,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455036275] [2022-03-15 16:42:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:27,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:28,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:28,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455036275] [2022-03-15 16:42:28,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455036275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:28,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513850990] [2022-03-15 16:42:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:28,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:28,047 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 16:42:28,048 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 16:42:28,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:28,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:28,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:28,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513850990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:28,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:28,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:42:28,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822204853] [2022-03-15 16:42:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:28,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:28,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:28,274 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:30,085 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-03-15 16:42:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:42:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:30,093 INFO L225 Difference]: With dead ends: 1814 [2022-03-15 16:42:30,093 INFO L226 Difference]: Without dead ends: 1814 [2022-03-15 16:42:30,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:42:30,096 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 482 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:30,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:42:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-03-15 16:42:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-03-15 16:42:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 16:42:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-15 16:42:30,113 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-15 16:42:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:30,113 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-15 16:42:30,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-15 16:42:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:30,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:30,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:30,130 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 16:42:30,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 16:42:30,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1394814506, now seen corresponding path program 9 times [2022-03-15 16:42:30,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:30,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850816916] [2022-03-15 16:42:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:30,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:30,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850816916] [2022-03-15 16:42:30,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850816916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:30,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382003171] [2022-03-15 16:42:30,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:30,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:30,376 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 16:42:30,386 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 16:42:30,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:30,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:30,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:30,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:30,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382003171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:30,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:30,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:42:30,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864563847] [2022-03-15 16:42:30,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:30,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:30,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:30,638 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:31,391 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-15 16:42:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:42:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:31,397 INFO L225 Difference]: With dead ends: 1470 [2022-03-15 16:42:31,397 INFO L226 Difference]: Without dead ends: 1470 [2022-03-15 16:42:31,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:42:31,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 363 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:31,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 275 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-15 16:42:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-15 16:42:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 16:42:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-15 16:42:31,411 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-15 16:42:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-15 16:42:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-15 16:42:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:31,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:31,412 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 16:42:31,438 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 16:42:31,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:31,628 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1964014118, now seen corresponding path program 1 times [2022-03-15 16:42:31,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:31,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282810917] [2022-03-15 16:42:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:31,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:31,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:31,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282810917] [2022-03-15 16:42:31,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282810917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:31,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775454252] [2022-03-15 16:42:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:31,656 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 16:42:31,659 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 16:42:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:42:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:31,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:31,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775454252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:31,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:31,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:42:31,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776259118] [2022-03-15 16:42:31,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:31,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:42:31,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:42:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:42:31,834 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:31,967 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-15 16:42:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:42:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:31,970 INFO L225 Difference]: With dead ends: 685 [2022-03-15 16:42:31,970 INFO L226 Difference]: Without dead ends: 679 [2022-03-15 16:42:31,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:31,971 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:31,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-15 16:42:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-15 16:42:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 16:42:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-15 16:42:31,980 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-15 16:42:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:31,980 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-15 16:42:31,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-15 16:42:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:31,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:31,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:32,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:32,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:42:32,195 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1893984470, now seen corresponding path program 10 times [2022-03-15 16:42:32,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:32,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656977077] [2022-03-15 16:42:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:32,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:32,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:32,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656977077] [2022-03-15 16:42:32,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656977077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:32,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37457000] [2022-03-15 16:42:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:32,252 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 16:42:32,267 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 16:42:32,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:32,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:32,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37457000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:32,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:32,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:42:32,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713018548] [2022-03-15 16:42:32,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:32,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:42:32,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:42:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:32,448 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:32,736 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-15 16:42:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:42:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:32,740 INFO L225 Difference]: With dead ends: 1159 [2022-03-15 16:42:32,740 INFO L226 Difference]: Without dead ends: 1111 [2022-03-15 16:42:32,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:32,741 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:32,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-15 16:42:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-15 16:42:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 16:42:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-15 16:42:32,758 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-15 16:42:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:32,758 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-15 16:42:32,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-15 16:42:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:32,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:32,760 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 16:42:32,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:32,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 16:42:32,976 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1188027138, now seen corresponding path program 2 times [2022-03-15 16:42:32,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:32,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091275353] [2022-03-15 16:42:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:33,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:33,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091275353] [2022-03-15 16:42:33,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091275353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:33,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708325335] [2022-03-15 16:42:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:33,013 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 16:42:33,014 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 16:42:33,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:42:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:33,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:33,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708325335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:33,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:33,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:42:33,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121208767] [2022-03-15 16:42:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:42:33,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:42:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:42:33,194 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:33,368 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-15 16:42:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:42:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:33,373 INFO L225 Difference]: With dead ends: 1267 [2022-03-15 16:42:33,373 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 16:42:33,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:42:33,376 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:33,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 16:42:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-15 16:42:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 16:42:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-15 16:42:33,392 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-15 16:42:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:33,393 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-15 16:42:33,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-15 16:42:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:33,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:33,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:33,411 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 16:42:33,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:42:33,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash -158654428, now seen corresponding path program 11 times [2022-03-15 16:42:33,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:33,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301181392] [2022-03-15 16:42:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:33,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:33,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301181392] [2022-03-15 16:42:33,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301181392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:33,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687262233] [2022-03-15 16:42:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:33,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:33,647 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 16:42:33,648 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 16:42:33,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687262233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:33,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:33,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:33,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777148720] [2022-03-15 16:42:33,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:33,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:33,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:33,764 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:34,302 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-15 16:42:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:42:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:34,311 INFO L225 Difference]: With dead ends: 2268 [2022-03-15 16:42:34,311 INFO L226 Difference]: Without dead ends: 2268 [2022-03-15 16:42:34,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:42:34,312 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:34,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-15 16:42:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-15 16:42:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states 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 16:42:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-15 16:42:34,336 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-15 16:42:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:34,336 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-15 16:42:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-15 16:42:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:34,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:34,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:34,374 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 16:42:34,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:42:34,571 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash 626259666, now seen corresponding path program 12 times [2022-03-15 16:42:34,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:34,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018980998] [2022-03-15 16:42:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:34,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:34,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018980998] [2022-03-15 16:42:34,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018980998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:34,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880853288] [2022-03-15 16:42:34,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:34,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:34,614 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 16:42:34,614 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 16:42:34,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:42:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:34,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:34,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880853288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:34,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:34,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:34,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567945439] [2022-03-15 16:42:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:34,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:34,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:34,752 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:35,309 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-15 16:42:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:42:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:35,318 INFO L225 Difference]: With dead ends: 2256 [2022-03-15 16:42:35,318 INFO L226 Difference]: Without dead ends: 2256 [2022-03-15 16:42:35,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:42:35,319 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:35,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 154 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-15 16:42:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-15 16:42:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states 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 16:42:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-15 16:42:35,343 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-15 16:42:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-15 16:42:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-15 16:42:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:35,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:35,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:35,366 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 16:42:35,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:35,566 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1014315128, now seen corresponding path program 13 times [2022-03-15 16:42:35,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:35,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777266754] [2022-03-15 16:42:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:35,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777266754] [2022-03-15 16:42:35,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777266754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:35,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281736317] [2022-03-15 16:42:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:35,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:35,619 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 16:42:35,634 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 16:42:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281736317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:35,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:35,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 16:42:35,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285744095] [2022-03-15 16:42:35,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:35,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:42:35,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:42:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:42:35,834 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:36,124 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-15 16:42:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:42:36,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:36,128 INFO L225 Difference]: With dead ends: 1611 [2022-03-15 16:42:36,128 INFO L226 Difference]: Without dead ends: 1611 [2022-03-15 16:42:36,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:42:36,129 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:36,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-15 16:42:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-15 16:42:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states 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 16:42:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-15 16:42:36,148 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-15 16:42:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:36,148 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-15 16:42:36,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-15 16:42:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:36,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:36,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:36,167 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 16:42:36,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:42:36,364 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash 581438524, now seen corresponding path program 14 times [2022-03-15 16:42:36,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:36,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556031897] [2022-03-15 16:42:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:36,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:36,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:36,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556031897] [2022-03-15 16:42:36,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556031897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:36,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016610520] [2022-03-15 16:42:36,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:36,400 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 16:42:36,401 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 16:42:36,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:36,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:36,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016610520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:36,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:36,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:36,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942258272] [2022-03-15 16:42:36,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:36,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:36,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:36,557 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:37,027 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-15 16:42:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:42:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:37,034 INFO L225 Difference]: With dead ends: 2408 [2022-03-15 16:42:37,034 INFO L226 Difference]: Without dead ends: 2404 [2022-03-15 16:42:37,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:42:37,035 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:37,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 168 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-15 16:42:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-15 16:42:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states 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 16:42:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-15 16:42:37,101 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-15 16:42:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-15 16:42:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-15 16:42:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:37,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:37,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:37,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:37,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:37,304 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 716068860, now seen corresponding path program 15 times [2022-03-15 16:42:37,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:37,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001826006] [2022-03-15 16:42:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:37,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:37,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001826006] [2022-03-15 16:42:37,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001826006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:37,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674489176] [2022-03-15 16:42:37,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:37,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:37,356 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 16:42:37,357 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 16:42:37,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:42:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:37,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:37,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674489176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:37,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:37,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:37,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279103035] [2022-03-15 16:42:37,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:37,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:37,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:37,497 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:38,279 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-15 16:42:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:42:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:38,289 INFO L225 Difference]: With dead ends: 3509 [2022-03-15 16:42:38,289 INFO L226 Difference]: Without dead ends: 3509 [2022-03-15 16:42:38,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:42:38,291 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 571 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:38,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 240 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-15 16:42:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-15 16:42:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states 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 16:42:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-15 16:42:38,385 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-15 16:42:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:38,385 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-15 16:42:38,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-15 16:42:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:38,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:38,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:38,406 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 16:42:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:38,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1935859282, now seen corresponding path program 16 times [2022-03-15 16:42:38,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:38,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609840424] [2022-03-15 16:42:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:38,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609840424] [2022-03-15 16:42:38,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609840424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420969096] [2022-03-15 16:42:38,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:38,651 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 16:42:38,652 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 16:42:38,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:38,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420969096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:38,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:38,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:38,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889983121] [2022-03-15 16:42:38,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:38,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:38,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:38,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:38,814 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:39,982 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-15 16:42:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:42:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:40,010 INFO L225 Difference]: With dead ends: 3211 [2022-03-15 16:42:40,010 INFO L226 Difference]: Without dead ends: 3207 [2022-03-15 16:42:40,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:42:40,012 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 512 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:40,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 251 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:42:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-15 16:42:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-15 16:42:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states 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 16:42:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-15 16:42:40,090 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-15 16:42:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:40,090 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-15 16:42:40,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-15 16:42:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:40,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:40,108 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 16:42:40,126 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 16:42:40,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:40,308 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1446822462, now seen corresponding path program 3 times [2022-03-15 16:42:40,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:40,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010748321] [2022-03-15 16:42:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:40,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:40,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010748321] [2022-03-15 16:42:40,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010748321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:40,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952065044] [2022-03-15 16:42:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:40,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:40,338 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 16:42:40,339 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 16:42:40,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:42:40,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:42:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:40,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:40,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952065044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:40,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:40,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-15 16:42:40,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5869417] [2022-03-15 16:42:40,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:40,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:42:40,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:42:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:42:40,484 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:40,600 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-15 16:42:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:42:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:40,603 INFO L225 Difference]: With dead ends: 1333 [2022-03-15 16:42:40,603 INFO L226 Difference]: Without dead ends: 1333 [2022-03-15 16:42:40,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:40,605 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:40,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-15 16:42:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-15 16:42:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 16:42:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-15 16:42:40,622 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-15 16:42:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:40,622 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-15 16:42:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-15 16:42:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:40,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:40,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:40,643 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 16:42:40,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:40,839 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1917945090, now seen corresponding path program 17 times [2022-03-15 16:42:40,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:40,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951555685] [2022-03-15 16:42:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:40,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:40,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951555685] [2022-03-15 16:42:40,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951555685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:40,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622365476] [2022-03-15 16:42:40,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:40,890 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 16:42:40,911 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 16:42:40,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:40,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:41,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622365476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:41,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:41,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:42:41,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777749991] [2022-03-15 16:42:41,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:41,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:42:41,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:42:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:42:41,046 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:41,408 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-15 16:42:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:42:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:41,413 INFO L225 Difference]: With dead ends: 2129 [2022-03-15 16:42:41,413 INFO L226 Difference]: Without dead ends: 2129 [2022-03-15 16:42:41,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:42:41,414 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:41,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-15 16:42:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-15 16:42:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states 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 16:42:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-15 16:42:41,437 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-15 16:42:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-15 16:42:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-15 16:42:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:41,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:41,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:41,460 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 16:42:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:42:41,656 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -15265638, now seen corresponding path program 18 times [2022-03-15 16:42:41,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:41,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310500320] [2022-03-15 16:42:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:41,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:41,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310500320] [2022-03-15 16:42:41,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310500320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:41,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560286953] [2022-03-15 16:42:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:41,692 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 16:42:41,694 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 16:42:41,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:41,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:41,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:41,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:41,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560286953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:41,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:41,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:42:41,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776530183] [2022-03-15 16:42:41,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:41,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:42:41,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:42:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:42:41,833 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:42,210 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-15 16:42:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:42:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:42,215 INFO L225 Difference]: With dead ends: 2262 [2022-03-15 16:42:42,215 INFO L226 Difference]: Without dead ends: 2262 [2022-03-15 16:42:42,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:42:42,217 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:42,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-15 16:42:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-15 16:42:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states 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 16:42:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-15 16:42:42,242 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-15 16:42:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:42,243 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-15 16:42:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-15 16:42:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:42,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:42,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:42,263 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 16:42:42,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:42:42,461 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1098288294, now seen corresponding path program 19 times [2022-03-15 16:42:42,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:42,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554733268] [2022-03-15 16:42:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:42,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:42,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554733268] [2022-03-15 16:42:42,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554733268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:42,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476608794] [2022-03-15 16:42:42,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:42,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:42,502 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 16:42:42,503 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 16:42:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:42,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:42,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476608794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:42,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:42,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 16:42:42,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607139928] [2022-03-15 16:42:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:42,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:42:42,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:42:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:42,682 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:42,890 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-15 16:42:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:42:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:42,894 INFO L225 Difference]: With dead ends: 1474 [2022-03-15 16:42:42,894 INFO L226 Difference]: Without dead ends: 1464 [2022-03-15 16:42:42,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:42:42,895 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:42,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-15 16:42:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-15 16:42:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states 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 16:42:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-15 16:42:42,915 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-15 16:42:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:42,915 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-15 16:42:42,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-15 16:42:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:42,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:42,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:42,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:43,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:43,135 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -60086780, now seen corresponding path program 20 times [2022-03-15 16:42:43,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:43,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426149728] [2022-03-15 16:42:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:43,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426149728] [2022-03-15 16:42:43,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426149728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:43,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457002036] [2022-03-15 16:42:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:43,170 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 16:42:43,171 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 16:42:43,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:43,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:43,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457002036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:43,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:43,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:42:43,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170444081] [2022-03-15 16:42:43,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:43,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:42:43,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:42:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:42:43,313 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:43,595 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-15 16:42:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:42:43,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:43,600 INFO L225 Difference]: With dead ends: 2318 [2022-03-15 16:42:43,601 INFO L226 Difference]: Without dead ends: 2314 [2022-03-15 16:42:43,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:42:43,601 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:43,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 121 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-15 16:42:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-15 16:42:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states 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 16:42:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-15 16:42:43,652 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-15 16:42:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-15 16:42:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-15 16:42:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:43,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:43,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:43,691 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 16:42:43,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:43,870 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash 537249878, now seen corresponding path program 21 times [2022-03-15 16:42:43,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:43,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358470962] [2022-03-15 16:42:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:43,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358470962] [2022-03-15 16:42:43,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358470962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700314279] [2022-03-15 16:42:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:43,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:43,929 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 16:42:43,929 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 16:42:43,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:43,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:44,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700314279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:44,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:44,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:42:44,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408094995] [2022-03-15 16:42:44,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:44,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:42:44,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:42:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:42:44,050 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:44,329 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-15 16:42:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:42:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:44,333 INFO L225 Difference]: With dead ends: 2302 [2022-03-15 16:42:44,333 INFO L226 Difference]: Without dead ends: 2290 [2022-03-15 16:42:44,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:44,334 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:44,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 124 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:42:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-15 16:42:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-15 16:42:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states 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 16:42:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-15 16:42:44,358 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-15 16:42:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:44,358 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-15 16:42:44,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-15 16:42:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:44,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:44,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:44,379 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 16:42:44,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:42:44,577 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 10829594, now seen corresponding path program 22 times [2022-03-15 16:42:44,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:44,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609417865] [2022-03-15 16:42:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:44,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:44,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:44,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609417865] [2022-03-15 16:42:44,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609417865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:44,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728311008] [2022-03-15 16:42:44,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:44,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:44,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:44,619 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 16:42:44,620 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 16:42:44,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:44,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:44,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728311008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:44,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:44,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:44,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693269134] [2022-03-15 16:42:44,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:44,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:44,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:44,805 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:45,533 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-15 16:42:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:42:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:45,541 INFO L225 Difference]: With dead ends: 4760 [2022-03-15 16:42:45,541 INFO L226 Difference]: Without dead ends: 4760 [2022-03-15 16:42:45,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:42:45,543 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:45,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 205 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-15 16:42:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-15 16:42:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states 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 16:42:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-15 16:42:45,613 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-15 16:42:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:45,613 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-15 16:42:45,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-15 16:42:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:45,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:45,616 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:45,632 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 16:42:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:42:45,832 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 577781674, now seen corresponding path program 23 times [2022-03-15 16:42:45,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:45,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141252940] [2022-03-15 16:42:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:45,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:45,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:45,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141252940] [2022-03-15 16:42:45,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141252940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:45,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414047363] [2022-03-15 16:42:45,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:45,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:45,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:45,868 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 16:42:45,869 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 16:42:45,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:46,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414047363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:46,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:46,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:46,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739644499] [2022-03-15 16:42:46,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:46,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:46,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:46,074 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:46,683 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-15 16:42:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:42:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:46,692 INFO L225 Difference]: With dead ends: 4260 [2022-03-15 16:42:46,692 INFO L226 Difference]: Without dead ends: 4260 [2022-03-15 16:42:46,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:42:46,693 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:46,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 199 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-15 16:42:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-15 16:42:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states 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 16:42:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-15 16:42:46,735 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-15 16:42:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:46,736 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-15 16:42:46,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-15 16:42:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:46,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:46,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:46,764 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 16:42:46,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:42:46,954 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -594564184, now seen corresponding path program 24 times [2022-03-15 16:42:46,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:46,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043260665] [2022-03-15 16:42:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:46,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:46,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043260665] [2022-03-15 16:42:46,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043260665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:46,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393414744] [2022-03-15 16:42:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:46,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:46,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:46,986 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 16:42:46,987 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 16:42:47,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:47,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:47,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393414744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:47,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:47,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:42:47,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807467047] [2022-03-15 16:42:47,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:47,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:42:47,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:42:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:42:47,101 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:47,565 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-15 16:42:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:42:47,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 16:42:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:47,574 INFO L225 Difference]: With dead ends: 4602 [2022-03-15 16:42:47,574 INFO L226 Difference]: Without dead ends: 4602 [2022-03-15 16:42:47,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:42:47,575 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:47,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 189 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-15 16:42:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-15 16:42:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states 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 16:42:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-15 16:42:47,619 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-15 16:42:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:47,619 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-15 16:42:47,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-15 16:42:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:47,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:47,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:47,637 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 16:42:47,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:47,837 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash -513188096, now seen corresponding path program 25 times [2022-03-15 16:42:47,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:47,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742958789] [2022-03-15 16:42:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:47,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742958789] [2022-03-15 16:42:47,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742958789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:47,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777466032] [2022-03-15 16:42:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:47,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:47,881 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:47,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:42:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777466032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:47,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:47,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:42:47,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197819963] [2022-03-15 16:42:47,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:42:47,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:42:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:42:47,996 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:48,468 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-15 16:42:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:42:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 16:42:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:48,476 INFO L225 Difference]: With dead ends: 4348 [2022-03-15 16:42:48,477 INFO L226 Difference]: Without dead ends: 4344 [2022-03-15 16:42:48,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:42:48,477 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 387 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:48,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 153 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-15 16:42:48,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-15 16:42:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 16:42:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-15 16:42:48,522 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-15 16:42:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:48,522 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-15 16:42:48,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-15 16:42:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:48,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:48,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:48,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:48,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:48,740 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 417469120, now seen corresponding path program 26 times [2022-03-15 16:42:48,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:48,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636642898] [2022-03-15 16:42:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:48,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:48,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636642898] [2022-03-15 16:42:48,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636642898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:48,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422872908] [2022-03-15 16:42:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:48,787 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:48,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:42:48,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:48,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:48,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:48,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422872908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:48,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:48,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:48,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196755680] [2022-03-15 16:42:48,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:48,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:48,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:48,962 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:49,519 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-15 16:42:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:42:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:49,526 INFO L225 Difference]: With dead ends: 4035 [2022-03-15 16:42:49,526 INFO L226 Difference]: Without dead ends: 4035 [2022-03-15 16:42:49,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:42:49,527 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:49,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 206 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-15 16:42:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-15 16:42:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states 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 16:42:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-15 16:42:49,563 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-15 16:42:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:49,563 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-15 16:42:49,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-15 16:42:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:49,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:49,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:49,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:49,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:49,782 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2060508274, now seen corresponding path program 27 times [2022-03-15 16:42:49,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:49,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233291341] [2022-03-15 16:42:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:49,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:49,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:49,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233291341] [2022-03-15 16:42:49,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233291341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:49,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810632300] [2022-03-15 16:42:49,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:49,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:49,826 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:42:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:42:50,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810632300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:50,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:50,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:42:50,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985243555] [2022-03-15 16:42:50,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:50,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:42:50,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:42:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:42:50,009 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:50,683 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-15 16:42:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:42:50,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:50,711 INFO L225 Difference]: With dead ends: 3794 [2022-03-15 16:42:50,711 INFO L226 Difference]: Without dead ends: 3790 [2022-03-15 16:42:50,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:42:50,713 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 332 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:50,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 201 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-15 16:42:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-15 16:42:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 16:42:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-15 16:42:50,744 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-15 16:42:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:50,744 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-15 16:42:50,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-15 16:42:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:50,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:50,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:50,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 16:42:50,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 16:42:50,960 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1231031038, now seen corresponding path program 28 times [2022-03-15 16:42:50,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:50,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426392211] [2022-03-15 16:42:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:51,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:51,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426392211] [2022-03-15 16:42:51,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426392211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:51,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979023954] [2022-03-15 16:42:51,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:51,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:51,005 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:51,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:42:51,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:51,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:51,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979023954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:51,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:51,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:51,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577749667] [2022-03-15 16:42:51,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:51,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:51,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:51,178 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:51,743 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-15 16:42:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:42:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:51,753 INFO L225 Difference]: With dead ends: 3978 [2022-03-15 16:42:51,754 INFO L226 Difference]: Without dead ends: 3978 [2022-03-15 16:42:51,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:42:51,755 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:51,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 190 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-15 16:42:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-15 16:42:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states 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 16:42:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-15 16:42:51,812 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-15 16:42:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:51,812 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-15 16:42:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-15 16:42:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:51,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:51,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:51,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:42:52,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:52,036 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1149654950, now seen corresponding path program 29 times [2022-03-15 16:42:52,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:52,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651527261] [2022-03-15 16:42:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:52,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:52,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651527261] [2022-03-15 16:42:52,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651527261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:52,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770757121] [2022-03-15 16:42:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:52,074 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:52,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:42:52,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:52,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:52,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770757121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:52,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:52,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:52,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300211922] [2022-03-15 16:42:52,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:52,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:52,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:52,210 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:52,617 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-15 16:42:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:42:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:52,625 INFO L225 Difference]: With dead ends: 3706 [2022-03-15 16:42:52,625 INFO L226 Difference]: Without dead ends: 3702 [2022-03-15 16:42:52,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:42:52,625 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-15 16:42:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-15 16:42:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states 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 16:42:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-15 16:42:52,674 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-15 16:42:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:52,674 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-15 16:42:52,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-15 16:42:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:52,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:52,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:52,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:52,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:52,893 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1630220374, now seen corresponding path program 30 times [2022-03-15 16:42:52,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:52,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168166621] [2022-03-15 16:42:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:52,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:52,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168166621] [2022-03-15 16:42:52,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168166621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:52,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115891692] [2022-03-15 16:42:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:52,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:52,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:52,936 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:52,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:42:52,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:52,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:53,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115891692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:53,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:53,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:42:53,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296904037] [2022-03-15 16:42:53,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:53,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:42:53,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:42:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:42:53,119 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:53,664 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-15 16:42:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:42:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:42:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:53,672 INFO L225 Difference]: With dead ends: 4114 [2022-03-15 16:42:53,672 INFO L226 Difference]: Without dead ends: 4102 [2022-03-15 16:42:53,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:42:53,673 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:53,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 209 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-15 16:42:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-15 16:42:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states 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 16:42:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-15 16:42:53,725 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-15 16:42:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-15 16:42:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-15 16:42:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:53,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:53,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:53,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:53,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:42:53,931 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620206, now seen corresponding path program 31 times [2022-03-15 16:42:53,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:53,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628584098] [2022-03-15 16:42:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:53,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:53,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:53,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628584098] [2022-03-15 16:42:53,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628584098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:53,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605693243] [2022-03-15 16:42:53,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:53,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:53,964 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:53,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:42:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:54,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:54,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605693243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:54,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:54,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:42:54,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043869588] [2022-03-15 16:42:54,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:54,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:54,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:54,117 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:54,568 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-15 16:42:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:42:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:54,575 INFO L225 Difference]: With dead ends: 3694 [2022-03-15 16:42:54,575 INFO L226 Difference]: Without dead ends: 3694 [2022-03-15 16:42:54,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:42:54,595 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:54,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-15 16:42:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-15 16:42:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states 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 16:42:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-15 16:42:54,686 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-15 16:42:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:54,686 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-15 16:42:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-15 16:42:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:54,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:54,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:54,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:54,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:42:54,903 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash 575418948, now seen corresponding path program 32 times [2022-03-15 16:42:54,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:54,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606178323] [2022-03-15 16:42:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:54,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:54,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:54,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606178323] [2022-03-15 16:42:54,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606178323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:54,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008790667] [2022-03-15 16:42:54,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:54,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:54,938 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:54,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:42:54,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:54,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:55,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008790667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:55,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:55,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:42:55,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007127811] [2022-03-15 16:42:55,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:55,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:42:55,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:42:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:42:55,137 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:55,954 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-15 16:42:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:42:55,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 16:42:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:55,960 INFO L225 Difference]: With dead ends: 3420 [2022-03-15 16:42:55,960 INFO L226 Difference]: Without dead ends: 3416 [2022-03-15 16:42:55,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:42:55,961 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:55,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 211 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:42:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-15 16:42:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-15 16:42:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states 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 16:42:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-15 16:42:56,025 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-15 16:42:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:56,025 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-15 16:42:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 16:42:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-15 16:42:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:42:56,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:56,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:56,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 16:42:56,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:42:56,244 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -692038230, now seen corresponding path program 33 times [2022-03-15 16:42:56,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:56,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643215728] [2022-03-15 16:42:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:56,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:56,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643215728] [2022-03-15 16:42:56,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643215728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:56,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823947650] [2022-03-15 16:42:56,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:56,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:56,282 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:56,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:42:56,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:56,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:42:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:56,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:56,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823947650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:56,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:56,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:42:56,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630356203] [2022-03-15 16:42:56,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:56,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:42:56,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:42:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:42:56,405 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:56,819 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-15 16:42:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:42:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 16:42:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:56,825 INFO L225 Difference]: With dead ends: 3256 [2022-03-15 16:42:56,826 INFO L226 Difference]: Without dead ends: 3244 [2022-03-15 16:42:56,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:42:56,827 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:56,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 193 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:42:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-15 16:42:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-15 16:42:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states 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 16:42:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-15 16:42:56,861 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-15 16:42:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:56,862 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-15 16:42:56,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 16:42:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-15 16:42:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:42:56,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:56,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:56,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:57,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:42:57,081 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1837488904, now seen corresponding path program 4 times [2022-03-15 16:42:57,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:57,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195629753] [2022-03-15 16:42:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:57,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:57,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195629753] [2022-03-15 16:42:57,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195629753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:57,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503057085] [2022-03-15 16:42:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:57,283 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:57,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:42:57,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:42:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:57,497 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 50 treesize of output 42 [2022-03-15 16:42:57,536 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:42:57,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-15 16:42:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:57,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 16:42:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:57,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:57,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:57,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:57,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-15 16:42:57,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:57,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-15 16:42:57,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:57,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:57,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:42:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:59,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:42:59,325 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:42:59,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:42:59,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:59,348 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 65 treesize of output 81 [2022-03-15 16:42:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:59,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503057085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:59,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:59,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:42:59,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375804885] [2022-03-15 16:42:59,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:59,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:42:59,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:42:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:42:59,636 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:01,229 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-03-15 16:43:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:43:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:01,238 INFO L225 Difference]: With dead ends: 3843 [2022-03-15 16:43:01,238 INFO L226 Difference]: Without dead ends: 3813 [2022-03-15 16:43:01,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:43:01,238 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 270 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:43:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-03-15 16:43:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-03-15 16:43:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states 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 16:43:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-15 16:43:01,278 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-15 16:43:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:01,279 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-15 16:43:01,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-15 16:43:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:01,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:01,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:01,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:01,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:43:01,499 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 429080376, now seen corresponding path program 5 times [2022-03-15 16:43:01,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:01,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067187434] [2022-03-15 16:43:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:01,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:01,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067187434] [2022-03-15 16:43:01,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067187434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:01,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220781387] [2022-03-15 16:43:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:01,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:01,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:01,646 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:01,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:43:01,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:01,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:01,862 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 48 treesize of output 40 [2022-03-15 16:43:01,871 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:43:01,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-15 16:43:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:01,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:43:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:01,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:02,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:43:02,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:02,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:43:03,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:03,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:03,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:03,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:43:03,307 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:43:03,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:43:03,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:03,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:03,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:03,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-15 16:43:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:03,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220781387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:03,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:03,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:43:03,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746805939] [2022-03-15 16:43:03,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:43:03,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:43:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:43:03,688 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:05,509 INFO L93 Difference]: Finished difference Result 4012 states and 12890 transitions. [2022-03-15 16:43:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:43:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:05,517 INFO L225 Difference]: With dead ends: 4012 [2022-03-15 16:43:05,517 INFO L226 Difference]: Without dead ends: 3997 [2022-03-15 16:43:05,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:43:05,518 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:05,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 261 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1125 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-03-15 16:43:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-03-15 16:43:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 1801. [2022-03-15 16:43:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.5861111111111112) internal successors, (6455), 1800 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states 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 16:43:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6455 transitions. [2022-03-15 16:43:05,561 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6455 transitions. Word has length 26 [2022-03-15 16:43:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6455 transitions. [2022-03-15 16:43:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6455 transitions. [2022-03-15 16:43:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:05,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:05,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:05,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:43:05,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 16:43:05,780 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2020509684, now seen corresponding path program 34 times [2022-03-15 16:43:05,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:05,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854208043] [2022-03-15 16:43:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:06,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:06,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854208043] [2022-03-15 16:43:06,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854208043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:06,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450536436] [2022-03-15 16:43:06,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:06,093 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:06,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:43:06,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:43:06,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:06,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:06,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:06,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 16:43:06,434 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-15 16:43:06,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 33 [2022-03-15 16:43:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:06,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:43:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:06,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:06,668 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:06,669 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 49 treesize of output 74 [2022-03-15 16:43:06,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:06,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-03-15 16:43:06,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:06,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:06,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:06,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-15 16:43:07,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:07,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:07,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-15 16:43:07,333 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-15 16:43:07,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-15 16:43:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:07,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:43:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:07,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450536436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:07,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:07,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-15 16:43:07,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796672546] [2022-03-15 16:43:07,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:07,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:43:07,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:43:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:43:07,416 INFO L87 Difference]: Start difference. First operand 1801 states and 6455 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:09,954 INFO L93 Difference]: Finished difference Result 3548 states and 11961 transitions. [2022-03-15 16:43:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:43:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:09,961 INFO L225 Difference]: With dead ends: 3548 [2022-03-15 16:43:09,961 INFO L226 Difference]: Without dead ends: 3533 [2022-03-15 16:43:09,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:43:09,962 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 322 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:09,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 322 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:43:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-03-15 16:43:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1853. [2022-03-15 16:43:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.576133909287257) internal successors, (6623), 1852 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states 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 16:43:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6623 transitions. [2022-03-15 16:43:09,998 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6623 transitions. Word has length 26 [2022-03-15 16:43:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:09,998 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6623 transitions. [2022-03-15 16:43:09,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6623 transitions. [2022-03-15 16:43:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:10,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:10,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:10,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:10,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:43:10,218 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1469410436, now seen corresponding path program 6 times [2022-03-15 16:43:10,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:10,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040749511] [2022-03-15 16:43:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:10,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:10,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040749511] [2022-03-15 16:43:10,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040749511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:10,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436357741] [2022-03-15 16:43:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:10,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:10,473 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:10,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:43:10,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:43:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:10,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:10,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:10,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 16:43:10,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:10,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-15 16:43:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:10,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:10,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:43:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:10,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:11,043 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:43:11,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:43:11,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:11,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:11,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:11,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:11,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:43:12,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:12,534 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 45 treesize of output 72 [2022-03-15 16:43:12,564 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:43:12,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:43:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:12,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:12,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-15 16:43:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:12,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436357741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:12,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:12,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-15 16:43:12,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670288153] [2022-03-15 16:43:12,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:12,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:43:12,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:43:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:43:12,957 INFO L87 Difference]: Start difference. First operand 1853 states and 6623 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:17,106 INFO L93 Difference]: Finished difference Result 4499 states and 14387 transitions. [2022-03-15 16:43:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:43:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:17,116 INFO L225 Difference]: With dead ends: 4499 [2022-03-15 16:43:17,116 INFO L226 Difference]: Without dead ends: 4469 [2022-03-15 16:43:17,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:43:17,118 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 557 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:17,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 650 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:43:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-03-15 16:43:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1877. [2022-03-15 16:43:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.5794243070362475) internal successors, (6715), 1876 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states 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 16:43:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6715 transitions. [2022-03-15 16:43:17,182 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6715 transitions. Word has length 26 [2022-03-15 16:43:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:17,182 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6715 transitions. [2022-03-15 16:43:17,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6715 transitions. [2022-03-15 16:43:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:17,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:17,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:17,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:43:17,401 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash 80971128, now seen corresponding path program 35 times [2022-03-15 16:43:17,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:17,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900202580] [2022-03-15 16:43:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:17,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:17,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900202580] [2022-03-15 16:43:17,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900202580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:17,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132747587] [2022-03-15 16:43:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:17,688 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:17,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:43:17,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:17,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:43:17,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:17,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 16:43:18,007 INFO L353 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2022-03-15 16:43:18,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 35 [2022-03-15 16:43:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:18,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:43:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:18,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:18,232 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:18,233 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 49 treesize of output 74 [2022-03-15 16:43:18,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-03-15 16:43:18,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,285 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 103 treesize of output 107 [2022-03-15 16:43:19,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:19,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:19,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-15 16:43:19,653 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-15 16:43:19,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-15 16:43:19,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:19,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:43:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:19,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132747587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:19,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:19,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-15 16:43:19,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088647633] [2022-03-15 16:43:19,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:19,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:43:19,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:43:19,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:43:19,765 INFO L87 Difference]: Start difference. First operand 1877 states and 6715 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:22,810 INFO L93 Difference]: Finished difference Result 4376 states and 14404 transitions. [2022-03-15 16:43:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:43:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:22,819 INFO L225 Difference]: With dead ends: 4376 [2022-03-15 16:43:22,819 INFO L226 Difference]: Without dead ends: 4329 [2022-03-15 16:43:22,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:43:22,820 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 445 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:22,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 470 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:43:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-03-15 16:43:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1914. [2022-03-15 16:43:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.5765812859383166) internal successors, (6842), 1913 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states 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 16:43:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6842 transitions. [2022-03-15 16:43:22,868 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6842 transitions. Word has length 26 [2022-03-15 16:43:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:22,868 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 6842 transitions. [2022-03-15 16:43:22,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6842 transitions. [2022-03-15 16:43:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:22,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:22,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:22,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:23,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:23,088 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -895347716, now seen corresponding path program 36 times [2022-03-15 16:43:23,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:23,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213593265] [2022-03-15 16:43:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:23,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:23,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213593265] [2022-03-15 16:43:23,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213593265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:23,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440285557] [2022-03-15 16:43:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:23,338 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:23,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:23,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:23,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:43:23,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:43:23,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:23,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2022-03-15 16:43:23,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:23,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 124 [2022-03-15 16:43:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:23,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:23,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-03-15 16:43:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:26,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:26,669 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:26,669 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 49 treesize of output 74 [2022-03-15 16:43:26,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:26,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-03-15 16:43:26,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:26,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-15 16:43:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:28,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:28,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:28,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-15 16:43:28,587 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-15 16:43:28,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-15 16:43:28,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:28,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:43:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:28,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440285557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:28,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:28,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-03-15 16:43:28,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395437739] [2022-03-15 16:43:28,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:28,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:43:28,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:28,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:43:28,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:43:28,680 INFO L87 Difference]: Start difference. First operand 1914 states and 6842 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:39,769 INFO L93 Difference]: Finished difference Result 5648 states and 18021 transitions. [2022-03-15 16:43:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-15 16:43:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:39,780 INFO L225 Difference]: With dead ends: 5648 [2022-03-15 16:43:39,780 INFO L226 Difference]: Without dead ends: 5588 [2022-03-15 16:43:39,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15357 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4191, Invalid=33639, Unknown=0, NotChecked=0, Total=37830 [2022-03-15 16:43:39,783 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 755 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:39,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 922 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:43:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-03-15 16:43:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 2010. [2022-03-15 16:43:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.5614733698357393) internal successors, (7155), 2009 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states 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 16:43:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7155 transitions. [2022-03-15 16:43:39,849 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7155 transitions. Word has length 26 [2022-03-15 16:43:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:39,849 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 7155 transitions. [2022-03-15 16:43:39,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7155 transitions. [2022-03-15 16:43:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:39,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:39,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:39,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:40,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:40,069 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash -713845664, now seen corresponding path program 7 times [2022-03-15 16:43:40,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:40,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301671761] [2022-03-15 16:43:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:40,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:40,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301671761] [2022-03-15 16:43:40,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301671761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:40,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397791058] [2022-03-15 16:43:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:40,364 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:40,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:43:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:40,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:40,705 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 53 treesize of output 45 [2022-03-15 16:43:40,719 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:43:40,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-15 16:43:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:40,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:43:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:40,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:40,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:40,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:43:40,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:40,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:40,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:40,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:40,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:43:42,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:42,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:42,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:43:42,790 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:43:42,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:43:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:42,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:42,812 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 65 treesize of output 81 [2022-03-15 16:43:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:43,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397791058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:43,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:43,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:43:43,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280490363] [2022-03-15 16:43:43,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:43,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:43:43,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:43:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:43:43,171 INFO L87 Difference]: Start difference. First operand 2010 states and 7155 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:44,543 INFO L93 Difference]: Finished difference Result 3994 states and 13061 transitions. [2022-03-15 16:43:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:43:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:44,550 INFO L225 Difference]: With dead ends: 3994 [2022-03-15 16:43:44,550 INFO L226 Difference]: Without dead ends: 3979 [2022-03-15 16:43:44,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:43:44,551 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 465 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:44,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 276 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1062 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-03-15 16:43:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-03-15 16:43:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2041. [2022-03-15 16:43:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.556862745098039) internal successors, (7256), 2040 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states 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 16:43:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7256 transitions. [2022-03-15 16:43:44,588 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7256 transitions. Word has length 26 [2022-03-15 16:43:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:44,588 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7256 transitions. [2022-03-15 16:43:44,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7256 transitions. [2022-03-15 16:43:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:44,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:44,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:44,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:44,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:43:44,807 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2087213910, now seen corresponding path program 8 times [2022-03-15 16:43:44,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:44,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616827821] [2022-03-15 16:43:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:44,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:44,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616827821] [2022-03-15 16:43:44,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616827821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:44,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620782822] [2022-03-15 16:43:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:44,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:45,000 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:45,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:43:45,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:43:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:45,287 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-03-15 16:43:45,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 215 [2022-03-15 16:43:45,318 INFO L353 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2022-03-15 16:43:45,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 132 [2022-03-15 16:43:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:45,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:45,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-03-15 16:43:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:45,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:45,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:45,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:45,710 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 46 treesize of output 73 [2022-03-15 16:43:45,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:45,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:45,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:45,761 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 97 treesize of output 103 [2022-03-15 16:43:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:46,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:43:46,161 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-15 16:43:46,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-03-15 16:43:46,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:46,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:43:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:46,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620782822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:46,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:46,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 16:43:46,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677994134] [2022-03-15 16:43:46,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:46,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:43:46,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:43:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:43:46,259 INFO L87 Difference]: Start difference. First operand 2041 states and 7256 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:50,642 INFO L93 Difference]: Finished difference Result 4646 states and 15150 transitions. [2022-03-15 16:43:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:43:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:50,651 INFO L225 Difference]: With dead ends: 4646 [2022-03-15 16:43:50,651 INFO L226 Difference]: Without dead ends: 4601 [2022-03-15 16:43:50,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1423, Invalid=8279, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:43:50,653 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 494 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:50,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 782 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2046 Invalid, 0 Unknown, 1150 Unchecked, 0.9s Time] [2022-03-15 16:43:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-03-15 16:43:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2094. [2022-03-15 16:43:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.560917343526039) internal successors, (7453), 2093 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states 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 16:43:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7453 transitions. [2022-03-15 16:43:50,706 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7453 transitions. Word has length 26 [2022-03-15 16:43:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:50,706 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7453 transitions. [2022-03-15 16:43:50,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7453 transitions. [2022-03-15 16:43:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:50,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:50,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:50,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:50,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:43:50,927 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1088334556, now seen corresponding path program 9 times [2022-03-15 16:43:50,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:50,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726549515] [2022-03-15 16:43:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:50,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:51,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:51,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726549515] [2022-03-15 16:43:51,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726549515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:51,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464469684] [2022-03-15 16:43:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:51,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:51,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:51,089 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:51,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:43:51,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:51,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:43:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:51,338 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 48 treesize of output 40 [2022-03-15 16:43:51,347 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:43:51,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-15 16:43:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:51,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:43:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:51,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:51,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:51,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:43:51,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:51,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:43:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:53,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:53,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:43:53,237 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:43:53,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:43:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:53,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:53,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-15 16:43:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:53,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464469684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:53,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:53,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:43:53,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380288950] [2022-03-15 16:43:53,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:43:53,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:43:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:43:53,693 INFO L87 Difference]: Start difference. First operand 2094 states and 7453 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:55,661 INFO L93 Difference]: Finished difference Result 4343 states and 14153 transitions. [2022-03-15 16:43:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:43:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:55,670 INFO L225 Difference]: With dead ends: 4343 [2022-03-15 16:43:55,670 INFO L226 Difference]: Without dead ends: 4328 [2022-03-15 16:43:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=957, Invalid=3735, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:43:55,671 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 531 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:55,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 314 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1190 Invalid, 0 Unknown, 291 Unchecked, 0.5s Time] [2022-03-15 16:43:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-15 16:43:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2101. [2022-03-15 16:43:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 3.5642857142857145) internal successors, (7485), 2100 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states 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 16:43:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 7485 transitions. [2022-03-15 16:43:55,737 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 7485 transitions. Word has length 26 [2022-03-15 16:43:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:55,737 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 7485 transitions. [2022-03-15 16:43:55,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 7485 transitions. [2022-03-15 16:43:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:55,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:55,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:55,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:43:55,957 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1589099960, now seen corresponding path program 10 times [2022-03-15 16:43:55,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:55,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174166543] [2022-03-15 16:43:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:55,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:56,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:56,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174166543] [2022-03-15 16:43:56,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174166543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:56,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048764306] [2022-03-15 16:43:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:56,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:56,172 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:56,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:43:56,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:56,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:56,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:56,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-15 16:43:56,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-03-15 16:43:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:56,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:43:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:56,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:56,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:43:56,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:43:56,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:56,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:56,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:43:57,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:43:57,264 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:43:57,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:43:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,280 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 65 treesize of output 81 [2022-03-15 16:43:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:57,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048764306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:57,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:57,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:43:57,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202765659] [2022-03-15 16:43:57,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:57,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:43:57,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:57,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:43:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:43:57,659 INFO L87 Difference]: Start difference. First operand 2101 states and 7485 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:59,903 INFO L93 Difference]: Finished difference Result 4739 states and 15412 transitions. [2022-03-15 16:43:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:43:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:43:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:59,912 INFO L225 Difference]: With dead ends: 4739 [2022-03-15 16:43:59,912 INFO L226 Difference]: Without dead ends: 4709 [2022-03-15 16:43:59,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:43:59,913 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:59,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 423 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1454 Invalid, 0 Unknown, 245 Unchecked, 0.6s Time] [2022-03-15 16:43:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-03-15 16:43:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 2096. [2022-03-15 16:43:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.562291169451074) internal successors, (7463), 2095 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states 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 16:43:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7463 transitions. [2022-03-15 16:43:59,983 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7463 transitions. Word has length 26 [2022-03-15 16:43:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7463 transitions. [2022-03-15 16:43:59,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7463 transitions. [2022-03-15 16:43:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:43:59,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:59,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:00,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:00,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:00,204 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -455050340, now seen corresponding path program 11 times [2022-03-15 16:44:00,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:00,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548957394] [2022-03-15 16:44:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:00,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:00,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548957394] [2022-03-15 16:44:00,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548957394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:00,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361736721] [2022-03-15 16:44:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:00,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:00,423 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:00,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:00,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:00,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:44:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:44:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:00,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:00,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-15 16:44:00,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:00,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-15 16:44:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:00,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:00,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:44:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:00,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:01,031 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:44:01,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:44:01,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:01,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:44:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:01,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:01,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:03,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:03,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:03,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:03,076 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:03,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:03,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:03,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:03,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-15 16:44:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:03,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361736721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:03,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:03,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-15 16:44:03,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924026473] [2022-03-15 16:44:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:44:03,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:44:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:44:03,419 INFO L87 Difference]: Start difference. First operand 2096 states and 7463 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:06,133 INFO L93 Difference]: Finished difference Result 4040 states and 13349 transitions. [2022-03-15 16:44:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:44:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:06,140 INFO L225 Difference]: With dead ends: 4040 [2022-03-15 16:44:06,140 INFO L226 Difference]: Without dead ends: 4010 [2022-03-15 16:44:06,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:44:06,141 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 281 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:06,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:44:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-03-15 16:44:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2094. [2022-03-15 16:44:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.5618729096989967) internal successors, (7455), 2093 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states 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 16:44:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7455 transitions. [2022-03-15 16:44:06,182 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7455 transitions. Word has length 26 [2022-03-15 16:44:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7455 transitions. [2022-03-15 16:44:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7455 transitions. [2022-03-15 16:44:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:06,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:06,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:06,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:06,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:44:06,396 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2073438884, now seen corresponding path program 12 times [2022-03-15 16:44:06,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:06,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528890857] [2022-03-15 16:44:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:06,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:06,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528890857] [2022-03-15 16:44:06,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528890857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:06,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376888305] [2022-03-15 16:44:06,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:06,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:06,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:06,602 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:06,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:44:06,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:44:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:44:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,871 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 45 treesize of output 37 [2022-03-15 16:44:06,883 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:44:06,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-03-15 16:44:06,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 16:44:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:06,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:07,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:07,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:07,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-15 16:44:07,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:07,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-15 16:44:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:07,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:07,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:08,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:08,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:08,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:08,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:08,553 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:08,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:08,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:08,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:08,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:08,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-15 16:44:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:08,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376888305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:08,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:08,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:44:08,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892484541] [2022-03-15 16:44:08,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:08,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:44:08,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:44:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:44:08,951 INFO L87 Difference]: Start difference. First operand 2094 states and 7455 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:10,629 INFO L93 Difference]: Finished difference Result 4187 states and 13537 transitions. [2022-03-15 16:44:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:44:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:10,638 INFO L225 Difference]: With dead ends: 4187 [2022-03-15 16:44:10,638 INFO L226 Difference]: Without dead ends: 4095 [2022-03-15 16:44:10,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=615, Invalid=2691, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:44:10,639 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:10,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 397 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:44:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-03-15 16:44:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2238. [2022-03-15 16:44:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.545820295037997) internal successors, (7932), 2237 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states 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 16:44:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7932 transitions. [2022-03-15 16:44:10,685 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7932 transitions. Word has length 26 [2022-03-15 16:44:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:10,685 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 7932 transitions. [2022-03-15 16:44:10,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7932 transitions. [2022-03-15 16:44:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:10,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:10,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:10,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:10,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:10,904 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 560738446, now seen corresponding path program 13 times [2022-03-15 16:44:10,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:10,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237312364] [2022-03-15 16:44:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:10,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:11,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:11,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237312364] [2022-03-15 16:44:11,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237312364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:11,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268613021] [2022-03-15 16:44:11,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:11,112 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:11,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:44:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:44:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:11,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:11,398 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 50 treesize of output 42 [2022-03-15 16:44:11,408 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:44:11,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-15 16:44:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:11,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-03-15 16:44:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:11,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:11,577 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:44:11,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:44:11,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:11,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:44:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:11,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:11,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:13,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:13,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:13,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:14,001 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:14,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:14,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,015 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 65 treesize of output 81 [2022-03-15 16:44:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:14,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268613021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:14,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:14,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-15 16:44:14,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467087311] [2022-03-15 16:44:14,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:44:14,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:44:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:44:14,238 INFO L87 Difference]: Start difference. First operand 2238 states and 7932 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:16,729 INFO L93 Difference]: Finished difference Result 4478 states and 14711 transitions. [2022-03-15 16:44:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:44:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:16,737 INFO L225 Difference]: With dead ends: 4478 [2022-03-15 16:44:16,737 INFO L226 Difference]: Without dead ends: 4438 [2022-03-15 16:44:16,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:44:16,738 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:16,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 456 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:44:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-03-15 16:44:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 2306. [2022-03-15 16:44:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.547939262472885) internal successors, (8178), 2305 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states 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 16:44:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8178 transitions. [2022-03-15 16:44:16,783 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8178 transitions. Word has length 26 [2022-03-15 16:44:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8178 transitions. [2022-03-15 16:44:16,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8178 transitions. [2022-03-15 16:44:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:16,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:16,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:16,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:16,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 16:44:16,995 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1495978748, now seen corresponding path program 14 times [2022-03-15 16:44:16,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:16,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947802845] [2022-03-15 16:44:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:16,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:17,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:17,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947802845] [2022-03-15 16:44:17,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947802845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:17,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664239442] [2022-03-15 16:44:17,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:17,226 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:44:17,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:44:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:17,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-15 16:44:17,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-03-15 16:44:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:17,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:44:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:17,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:17,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-15 16:44:17,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-15 16:44:17,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:17,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:17,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:18,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:18,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:18,973 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:18,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:18,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:18,987 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 65 treesize of output 81 [2022-03-15 16:44:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:19,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664239442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:19,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:19,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:44:19,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140304418] [2022-03-15 16:44:19,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:19,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:44:19,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:44:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:44:19,233 INFO L87 Difference]: Start difference. First operand 2306 states and 8178 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:20,958 INFO L93 Difference]: Finished difference Result 4536 states and 14768 transitions. [2022-03-15 16:44:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:44:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:20,985 INFO L225 Difference]: With dead ends: 4536 [2022-03-15 16:44:20,985 INFO L226 Difference]: Without dead ends: 4447 [2022-03-15 16:44:20,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:44:20,986 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:20,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 225 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 856 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-03-15 16:44:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-03-15 16:44:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 2342. [2022-03-15 16:44:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.552755232806493) internal successors, (8317), 2341 states have internal predecessors, (8317), 0 states have call successors, (0), 0 states 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 16:44:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8317 transitions. [2022-03-15 16:44:21,031 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8317 transitions. Word has length 26 [2022-03-15 16:44:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:21,031 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 8317 transitions. [2022-03-15 16:44:21,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8317 transitions. [2022-03-15 16:44:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:21,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:21,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:21,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:44:21,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:44:21,248 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 961943836, now seen corresponding path program 15 times [2022-03-15 16:44:21,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:21,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517388977] [2022-03-15 16:44:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:21,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:21,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517388977] [2022-03-15 16:44:21,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517388977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:21,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100612515] [2022-03-15 16:44:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:21,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:21,455 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:44:21,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:44:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:23,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:23,030 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 48 treesize of output 40 [2022-03-15 16:44:23,040 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:44:23,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-15 16:44:23,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:23,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:44:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:23,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:23,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:23,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-15 16:44:23,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:23,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-15 16:44:23,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:23,312 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 91 treesize of output 115 [2022-03-15 16:44:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:27,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100612515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:27,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:27,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:44:27,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383294389] [2022-03-15 16:44:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:27,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:44:27,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:44:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-15 16:44:27,315 INFO L87 Difference]: Start difference. First operand 2342 states and 8317 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:31,143 INFO L93 Difference]: Finished difference Result 4016 states and 13362 transitions. [2022-03-15 16:44:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:44:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:31,150 INFO L225 Difference]: With dead ends: 4016 [2022-03-15 16:44:31,150 INFO L226 Difference]: Without dead ends: 3983 [2022-03-15 16:44:31,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=594, Invalid=2483, Unknown=3, NotChecked=0, Total=3080 [2022-03-15 16:44:31,153 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:31,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 244 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 708 Invalid, 0 Unknown, 356 Unchecked, 0.4s Time] [2022-03-15 16:44:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-03-15 16:44:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2371. [2022-03-15 16:44:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.5544303797468353) internal successors, (8424), 2370 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states 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 16:44:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 8424 transitions. [2022-03-15 16:44:31,194 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 8424 transitions. Word has length 26 [2022-03-15 16:44:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 8424 transitions. [2022-03-15 16:44:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 8424 transitions. [2022-03-15 16:44:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:31,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:31,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:31,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:31,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:31,411 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -655588944, now seen corresponding path program 16 times [2022-03-15 16:44:31,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:31,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260656347] [2022-03-15 16:44:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:31,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:31,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260656347] [2022-03-15 16:44:31,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260656347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:31,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969914853] [2022-03-15 16:44:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:31,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:31,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:31,603 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:31,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:44:31,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:31,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:44:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:31,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:31,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 16:44:31,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:31,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-15 16:44:31,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:31,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:31,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:44:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:44:32,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:44:32,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:33,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:33,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:33,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:33,248 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:33,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:33,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:33,271 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 65 treesize of output 81 [2022-03-15 16:44:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:33,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969914853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:33,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:33,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:44:33,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312586901] [2022-03-15 16:44:33,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:44:33,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:44:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:44:33,701 INFO L87 Difference]: Start difference. First operand 2371 states and 8424 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:36,073 INFO L93 Difference]: Finished difference Result 4739 states and 15611 transitions. [2022-03-15 16:44:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:44:36,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:36,083 INFO L225 Difference]: With dead ends: 4739 [2022-03-15 16:44:36,083 INFO L226 Difference]: Without dead ends: 4695 [2022-03-15 16:44:36,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:44:36,085 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 490 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:36,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 283 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 881 Invalid, 0 Unknown, 339 Unchecked, 0.5s Time] [2022-03-15 16:44:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-03-15 16:44:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 2402. [2022-03-15 16:44:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 3.5622657226155767) internal successors, (8553), 2401 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states 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 16:44:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 8553 transitions. [2022-03-15 16:44:36,169 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 8553 transitions. Word has length 26 [2022-03-15 16:44:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 8553 transitions. [2022-03-15 16:44:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 8553 transitions. [2022-03-15 16:44:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:36,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:36,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:36,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:36,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 16:44:36,387 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1949435448, now seen corresponding path program 17 times [2022-03-15 16:44:36,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:36,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38467821] [2022-03-15 16:44:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:36,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:36,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:36,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38467821] [2022-03-15 16:44:36,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38467821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:36,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774003549] [2022-03-15 16:44:36,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:36,608 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:44:36,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:44:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:39,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:39,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-15 16:44:39,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-15 16:44:39,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:39,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:44:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:39,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:39,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-15 16:44:39,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-15 16:44:39,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:44:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:40,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:40,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:40,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:44:40,093 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:44:40,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:44:40,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:40,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:40,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:40,116 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 65 treesize of output 81 [2022-03-15 16:44:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:40,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774003549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:40,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:40,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:44:40,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705733810] [2022-03-15 16:44:40,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:40,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:44:40,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:44:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-03-15 16:44:40,680 INFO L87 Difference]: Start difference. First operand 2402 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:43,360 INFO L93 Difference]: Finished difference Result 4699 states and 15443 transitions. [2022-03-15 16:44:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:44:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:44:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:43,372 INFO L225 Difference]: With dead ends: 4699 [2022-03-15 16:44:43,372 INFO L226 Difference]: Without dead ends: 4617 [2022-03-15 16:44:43,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1030, Invalid=5130, Unknown=2, NotChecked=0, Total=6162 [2022-03-15 16:44:43,374 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 410 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:43,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 331 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1217 Invalid, 0 Unknown, 378 Unchecked, 0.6s Time] [2022-03-15 16:44:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-03-15 16:44:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2487. [2022-03-15 16:44:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 3.5595333869670154) internal successors, (8849), 2486 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states 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 16:44:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 8849 transitions. [2022-03-15 16:44:43,431 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 8849 transitions. Word has length 26 [2022-03-15 16:44:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:43,431 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 8849 transitions. [2022-03-15 16:44:43,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 8849 transitions. [2022-03-15 16:44:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:44:43,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:43,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:43,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:43,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:44:43,651 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 702714798, now seen corresponding path program 18 times [2022-03-15 16:44:43,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:43,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080523281] [2022-03-15 16:44:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:43,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:43,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080523281] [2022-03-15 16:44:43,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080523281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:43,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395235150] [2022-03-15 16:44:43,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:43,863 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:43,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:44:43,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:44:43,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:44:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:45,500 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 53 treesize of output 45 [2022-03-15 16:44:45,513 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-15 16:44:45,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-15 16:44:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:45,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 16:44:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:45,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:45,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-15 16:44:45,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:45,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-15 16:44:45,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:45,761 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 91 treesize of output 115 [2022-03-15 16:45:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:37,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395235150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:37,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:37,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:45:37,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893314377] [2022-03-15 16:45:37,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:37,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:45:37,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:45:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-15 16:45:37,632 INFO L87 Difference]: Start difference. First operand 2487 states and 8849 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:41,862 INFO L93 Difference]: Finished difference Result 4278 states and 14188 transitions. [2022-03-15 16:45:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:45:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:45:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:41,871 INFO L225 Difference]: With dead ends: 4278 [2022-03-15 16:45:41,871 INFO L226 Difference]: Without dead ends: 4245 [2022-03-15 16:45:41,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=609, Invalid=2580, Unknown=3, NotChecked=0, Total=3192 [2022-03-15 16:45:41,871 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:41,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 288 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 712 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2022-03-15 16:45:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-03-15 16:45:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2488. [2022-03-15 16:45:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 3.560514676316848) internal successors, (8855), 2487 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states 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 16:45:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 8855 transitions. [2022-03-15 16:45:41,917 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 8855 transitions. Word has length 26 [2022-03-15 16:45:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:41,917 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 8855 transitions. [2022-03-15 16:45:41,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 8855 transitions. [2022-03-15 16:45:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:45:41,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:41,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:41,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 16:45:42,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:42,135 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820314, now seen corresponding path program 19 times [2022-03-15 16:45:42,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:42,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825118851] [2022-03-15 16:45:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:42,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:42,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:42,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825118851] [2022-03-15 16:45:42,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825118851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:42,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018467009] [2022-03-15 16:45:42,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:42,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:42,410 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:42,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:45:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:45:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:42,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:42,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-15 16:45:42,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:42,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-15 16:45:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:42,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:42,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-15 16:45:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:42,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:43,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:43,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-15 16:45:43,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:43,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-15 16:45:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:43,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:43,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-15 16:45:45,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:45,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:45,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-15 16:45:45,350 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 16:45:45,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-15 16:45:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:45,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:45,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:45,390 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 65 treesize of output 81 [2022-03-15 16:45:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:45,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018467009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:45,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:45,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:45:45,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61115699] [2022-03-15 16:45:45,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:45,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:45:45,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:45:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:45:45,848 INFO L87 Difference]: Start difference. First operand 2488 states and 8855 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:48,191 INFO L93 Difference]: Finished difference Result 4800 states and 15839 transitions. [2022-03-15 16:45:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:45:48,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:45:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:48,201 INFO L225 Difference]: With dead ends: 4800 [2022-03-15 16:45:48,201 INFO L226 Difference]: Without dead ends: 4764 [2022-03-15 16:45:48,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:45:48,202 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 495 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:48,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 304 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 921 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-03-15 16:45:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2022-03-15 16:45:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2490. [2022-03-15 16:45:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.56046605062274) internal successors, (8862), 2489 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states 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 16:45:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 8862 transitions. [2022-03-15 16:45:48,256 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 8862 transitions. Word has length 26 [2022-03-15 16:45:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:48,256 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 8862 transitions. [2022-03-15 16:45:48,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 8862 transitions. [2022-03-15 16:45:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:45:48,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:48,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:48,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:48,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:48,476 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2089528438, now seen corresponding path program 37 times [2022-03-15 16:45:48,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:48,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800028236] [2022-03-15 16:45:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:48,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:48,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800028236] [2022-03-15 16:45:48,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800028236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:48,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27165181] [2022-03-15 16:45:48,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:48,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:48,719 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:45:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:45:48,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:49,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 68 [2022-03-15 16:45:49,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 118 [2022-03-15 16:45:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:49,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,105 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 127 treesize of output 123 [2022-03-15 16:45:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:49,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:49,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 68 [2022-03-15 16:45:49,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 112 [2022-03-15 16:45:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,597 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 103 treesize of output 97 [2022-03-15 16:45:49,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:49,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:45:49,937 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-15 16:45:49,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 35 [2022-03-15 16:45:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:45:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:50,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27165181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:50,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:50,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:45:50,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478917615] [2022-03-15 16:45:50,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:50,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:45:50,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:50,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:45:50,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:45:50,048 INFO L87 Difference]: Start difference. First operand 2490 states and 8862 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:52,155 INFO L93 Difference]: Finished difference Result 4251 states and 14249 transitions. [2022-03-15 16:45:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:45:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:45:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:52,166 INFO L225 Difference]: With dead ends: 4251 [2022-03-15 16:45:52,166 INFO L226 Difference]: Without dead ends: 4206 [2022-03-15 16:45:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=809, Invalid=3883, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:45:52,167 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:52,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 308 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:45:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-03-15 16:45:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 2520. [2022-03-15 16:45:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 3.55577610162763) internal successors, (8957), 2519 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states 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 16:45:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 8957 transitions. [2022-03-15 16:45:52,232 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 8957 transitions. Word has length 26 [2022-03-15 16:45:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 8957 transitions. [2022-03-15 16:45:52,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 8957 transitions. [2022-03-15 16:45:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:45:52,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:52,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:52,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:52,455 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash -971763080, now seen corresponding path program 38 times [2022-03-15 16:45:52,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:52,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935384491] [2022-03-15 16:45:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:52,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:52,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935384491] [2022-03-15 16:45:52,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935384491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:52,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622076177] [2022-03-15 16:45:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:52,674 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:52,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:45:52,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:45:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:52,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:52,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:52,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-03-15 16:45:52,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:52,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 115 [2022-03-15 16:45:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:52,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:52,904 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 127 treesize of output 123 [2022-03-15 16:45:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:53,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:03,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 75 [2022-03-15 16:46:03,851 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-15 16:46:03,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 45 [2022-03-15 16:46:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:03,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-15 16:46:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:03,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622076177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:03,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:03,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-03-15 16:46:03,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035218132] [2022-03-15 16:46:03,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:03,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:46:03,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:46:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=500, Unknown=8, NotChecked=0, Total=600 [2022-03-15 16:46:03,888 INFO L87 Difference]: Start difference. First operand 2520 states and 8957 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:06,433 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3))) (< c_i c_N) (not (< c_k c_N))) (<= 0 c_M)) is different from false [2022-03-15 16:46:08,330 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* (- 1) (select (select c_mult (select c_A 1)) (select c_B 1))) c_res1) (select (select c_mult (select c_A 0)) (select c_B 0))) (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (= 2 c_i) (< 1 c_N) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M) (= c_res2 (let ((.cse4 (+ (- 1) c_k))) (select (select c_mult (select c_A .cse4)) (select c_B .cse4))))) is different from false [2022-03-15 16:46:09,764 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M)) is different from false [2022-03-15 16:46:28,861 WARN L228 SmtUtils]: Spent 15.63s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:46:53,923 WARN L228 SmtUtils]: Spent 16.29s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:47:21,838 WARN L228 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:47:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:21,970 INFO L93 Difference]: Finished difference Result 6301 states and 20785 transitions. [2022-03-15 16:47:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:47:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:47:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:21,982 INFO L225 Difference]: With dead ends: 6301 [2022-03-15 16:47:21,982 INFO L226 Difference]: Without dead ends: 6133 [2022-03-15 16:47:21,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=890, Invalid=5572, Unknown=30, NotChecked=480, Total=6972 [2022-03-15 16:47:21,983 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 364 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:21,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 547 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1869 Invalid, 0 Unknown, 416 Unchecked, 1.0s Time] [2022-03-15 16:47:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-03-15 16:47:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 2611. [2022-03-15 16:47:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.539463601532567) internal successors, (9238), 2610 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states 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 16:47:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 9238 transitions. [2022-03-15 16:47:22,054 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 9238 transitions. Word has length 26 [2022-03-15 16:47:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:22,054 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 9238 transitions. [2022-03-15 16:47:22,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 9238 transitions. [2022-03-15 16:47:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:47:22,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:22,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:22,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:47:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:47:22,276 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash 96111484, now seen corresponding path program 39 times [2022-03-15 16:47:22,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:22,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573494148] [2022-03-15 16:47:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:22,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:22,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:22,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573494148] [2022-03-15 16:47:22,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573494148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:22,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92141122] [2022-03-15 16:47:22,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:47:22,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:22,521 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:22,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:47:22,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:47:22,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:47:22,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:22,925 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-03-15 16:47:22,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 225 [2022-03-15 16:47:22,962 INFO L353 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-03-15 16:47:22,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 151 [2022-03-15 16:47:22,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:22,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:22,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:22,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 Received shutdown request... [2022-03-15 16:56:42,018 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:56:42,021 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:56:42,022 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:56:42,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:56:42,040 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 16:56:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-15 16:56:42,235 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. [2022-03-15 16:56:42,237 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:56:42,237 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:56:42,237 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:56:42,239 INFO L732 BasicCegarLoop]: Path program histogram: [39, 19, 1, 1, 1] [2022-03-15 16:56:42,241 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:56:42,241 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:56:42,242 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:56:42 BasicIcfg [2022-03-15 16:56:42,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:56:42,242 INFO L158 Benchmark]: Toolchain (without parser) took 868618.88ms. Allocated memory was 215.0MB in the beginning and 697.3MB in the end (delta: 482.3MB). Free memory was 179.4MB in the beginning and 279.3MB in the end (delta: -99.9MB). Peak memory consumption was 429.2MB. Max. memory is 8.0GB. [2022-03-15 16:56:42,242 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 215.0MB. Free memory is still 180.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:56:42,242 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.77ms. Allocated memory is still 215.0MB. Free memory was 179.3MB in the beginning and 177.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:56:42,242 INFO L158 Benchmark]: Boogie Preprocessor took 11.37ms. Allocated memory is still 215.0MB. Free memory was 177.7MB in the beginning and 176.7MB in the end (delta: 998.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:56:42,243 INFO L158 Benchmark]: RCFGBuilder took 220.48ms. Allocated memory is still 215.0MB. Free memory was 176.7MB in the beginning and 167.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:56:42,243 INFO L158 Benchmark]: TraceAbstraction took 868348.63ms. Allocated memory was 215.0MB in the beginning and 697.3MB in the end (delta: 482.3MB). Free memory was 166.8MB in the beginning and 279.3MB in the end (delta: -112.5MB). Peak memory consumption was 416.6MB. Max. memory is 8.0GB. [2022-03-15 16:56:42,243 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 0.14ms. Allocated memory is still 215.0MB. Free memory is still 180.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.77ms. Allocated memory is still 215.0MB. Free memory was 179.3MB in the beginning and 177.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.37ms. Allocated memory is still 215.0MB. Free memory was 177.7MB in the beginning and 176.7MB in the end (delta: 998.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.48ms. Allocated memory is still 215.0MB. Free memory was 176.7MB in the beginning and 167.3MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 868348.63ms. Allocated memory was 215.0MB in the beginning and 697.3MB in the end (delta: 482.3MB). Free memory was 166.8MB in the beginning and 279.3MB in the end (delta: -112.5MB). Peak memory consumption was 416.6MB. 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: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 868.2s, OverallIterations: 61, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.2s, AutomataDifference: 161.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19519 SdHoareTripleChecker+Valid, 23.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19519 mSDsluCounter, 14459 SdHoareTripleChecker+Invalid, 19.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4427 IncrementalHoareTripleChecker+Unchecked, 25530 mSDsCounter, 3947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51087 IncrementalHoareTripleChecker+Invalid, 59461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3947 mSolverCounterUnsat, 1424 mSDtfsCounter, 51087 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5461 GetRequests, 2127 SyntacticMatches, 165 SemanticMatches, 3169 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 79105 ImplicationChecksByTransitivity, 159.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2611occurred in iteration=60, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 60 MinimizatonAttempts, 98568 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 129.6s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2848 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4078 ConstructedInterpolants, 35 QuantifiedInterpolants, 59352 SizeOfPredicates, 654 NumberOfNonLiveVariables, 3533 ConjunctsInSsa, 846 ConjunctsInUnsatCore, 174 InterpolantComputations, 3 PerfectInterpolantSequences, 174/878 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