/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/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:13:02,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:13:02,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:13:02,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:13:02,988 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 [2022-02-11 01:13:03,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:13:03,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:13:03,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:13:03,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:13:03,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:13:03,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:13:03,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:13:03,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:13:03,015 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:13:03,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:13:03,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:13:03,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:13:03,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:13:03,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:13:03,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:13:03,018 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:13:03,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:13:03,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:13:03,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:13:03,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:13:03,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:13:03,250 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:13:03,251 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:13:03,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2022-02-11 01:13:03,253 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2022-02-11 01:13:03,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:13:03,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:13:03,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:13:03,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:13:03,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:13:03,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,294 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:13:03,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:13:03,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:13:03,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:13:03,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:13:03,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:13:03,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:13:03,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:13:03,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:13:03,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/1) ... [2022-02-11 01:13:03,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:13:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:03,355 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) [2022-02-11 01:13:03,375 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 [2022-02-11 01:13:03,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:13:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:13:03,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:13:03,390 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:13:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:13:03,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:13:03,390 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:13:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:13:03,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:13:03,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 01:13:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 01:13:03,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 01:13:03,392 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:13:03,427 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:13:03,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:13:03,498 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:13:03,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:13:03,503 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:13:03,504 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:13:03 BoogieIcfgContainer [2022-02-11 01:13:03,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:13:03,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:13:03,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:13:03,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:13:03,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:13:03" (1/2) ... [2022-02-11 01:13:03,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260a3deb and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:13:03, skipping insertion in model container [2022-02-11 01:13:03,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:13:03" (2/2) ... [2022-02-11 01:13:03,510 INFO L112 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2022-02-11 01:13:03,513 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:13:03,514 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:13:03,514 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:13:03,514 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:13:03,538 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 01:13:03,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:13:03,595 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, 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 [2022-02-11 01:13:03,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 01:13:03,602 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-02-11 01:13:03,675 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:13:03,688 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:03,689 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:03,689 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 855514725, now seen corresponding path program 1 times [2022-02-11 01:13:03,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:03,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541355377] [2022-02-11 01:13:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:03,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:03,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541355377] [2022-02-11 01:13:03,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541355377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:03,814 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:03,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:13:03,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123878849] [2022-02-11 01:13:03,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:03,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:13:03,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:13:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:13:03,841 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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) [2022-02-11 01:13:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:03,877 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-02-11 01:13:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:13:03,879 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 [2022-02-11 01:13:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:03,888 INFO L225 Difference]: With dead ends: 298 [2022-02-11 01:13:03,888 INFO L226 Difference]: Without dead ends: 283 [2022-02-11 01:13:03,889 INFO L933 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 [2022-02-11 01:13:03,892 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 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 [2022-02-11 01:13:03,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:13:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-11 01:13:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-02-11 01:13:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-02-11 01:13:03,974 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-02-11 01:13:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:03,975 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-02-11 01:13:03,975 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) [2022-02-11 01:13:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-02-11 01:13:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:03,978 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:03,979 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:03,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:13:03,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash -116344776, now seen corresponding path program 1 times [2022-02-11 01:13:03,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:03,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71211887] [2022-02-11 01:13:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:04,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71211887] [2022-02-11 01:13:04,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71211887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:04,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544579825] [2022-02-11 01:13:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:04,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:04,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:04,141 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) [2022-02-11 01:13:04,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:13:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:13:04,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:04,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:04,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544579825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:04,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:04,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-11 01:13:04,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846834563] [2022-02-11 01:13:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:04,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:04,444 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:04,941 INFO L93 Difference]: Finished difference Result 1259 states and 3629 transitions. [2022-02-11 01:13:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 01:13:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-02-11 01:13:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:04,948 INFO L225 Difference]: With dead ends: 1259 [2022-02-11 01:13:04,948 INFO L226 Difference]: Without dead ends: 1259 [2022-02-11 01:13:04,949 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:04,950 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:04,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-11 01:13:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 253. [2022-02-11 01:13:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2022-02-11 01:13:04,970 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2022-02-11 01:13:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:04,970 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2022-02-11 01:13:04,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2022-02-11 01:13:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:04,971 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:04,972 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:04,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:05,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:05,188 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -310245444, now seen corresponding path program 2 times [2022-02-11 01:13:05,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:05,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973906154] [2022-02-11 01:13:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:05,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:05,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973906154] [2022-02-11 01:13:05,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973906154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:05,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123164920] [2022-02-11 01:13:05,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:05,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:05,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:05,241 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) [2022-02-11 01:13:05,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:13:05,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:05,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:13:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:05,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:05,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123164920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:05,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:05,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-11 01:13:05,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128720114] [2022-02-11 01:13:05,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:05,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:05,424 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:05,772 INFO L93 Difference]: Finished difference Result 1133 states and 3241 transitions. [2022-02-11 01:13:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 01:13:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-02-11 01:13:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:05,778 INFO L225 Difference]: With dead ends: 1133 [2022-02-11 01:13:05,779 INFO L226 Difference]: Without dead ends: 1133 [2022-02-11 01:13:05,779 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:13:05,780 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:05,780 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 95 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-02-11 01:13:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 252. [2022-02-11 01:13:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2022-02-11 01:13:05,793 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2022-02-11 01:13:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:05,794 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2022-02-11 01:13:05,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2022-02-11 01:13:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:05,795 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:05,795 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:05,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:06,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-11 01:13:06,014 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1009084743, now seen corresponding path program 1 times [2022-02-11 01:13:06,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:06,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590806449] [2022-02-11 01:13:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:06,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590806449] [2022-02-11 01:13:06,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590806449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:06,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:06,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 01:13:06,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141009343] [2022-02-11 01:13:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:13:06,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:13:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:13:06,059 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:06,123 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2022-02-11 01:13:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:13:06,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:06,126 INFO L225 Difference]: With dead ends: 483 [2022-02-11 01:13:06,126 INFO L226 Difference]: Without dead ends: 477 [2022-02-11 01:13:06,126 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:13:06,127 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:06,127 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 28 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:13:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-11 01:13:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2022-02-11 01:13:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-02-11 01:13:06,135 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2022-02-11 01:13:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:06,135 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-02-11 01:13:06,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-02-11 01:13:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:06,136 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:06,136 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:06,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 01:13:06,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1724408590, now seen corresponding path program 1 times [2022-02-11 01:13:06,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:06,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687147870] [2022-02-11 01:13:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:06,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687147870] [2022-02-11 01:13:06,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687147870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:06,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:06,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 01:13:06,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173018408] [2022-02-11 01:13:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:13:06,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:13:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:13:06,189 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:06,264 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2022-02-11 01:13:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:13:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:06,266 INFO L225 Difference]: With dead ends: 539 [2022-02-11 01:13:06,266 INFO L226 Difference]: Without dead ends: 521 [2022-02-11 01:13:06,267 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:13:06,267 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:06,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 45 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-11 01:13:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2022-02-11 01:13:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2022-02-11 01:13:06,276 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2022-02-11 01:13:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:06,277 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2022-02-11 01:13:06,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2022-02-11 01:13:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:06,278 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:06,278 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:06,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 01:13:06,278 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1927279607, now seen corresponding path program 2 times [2022-02-11 01:13:06,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:06,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034700686] [2022-02-11 01:13:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:06,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:06,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034700686] [2022-02-11 01:13:06,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034700686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:06,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:06,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 01:13:06,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461101874] [2022-02-11 01:13:06,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 01:13:06,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 01:13:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:13:06,308 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:06,353 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2022-02-11 01:13:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:13:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:06,356 INFO L225 Difference]: With dead ends: 486 [2022-02-11 01:13:06,356 INFO L226 Difference]: Without dead ends: 486 [2022-02-11 01:13:06,356 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:13:06,357 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:06,357 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:13:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-02-11 01:13:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2022-02-11 01:13:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2022-02-11 01:13:06,366 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2022-02-11 01:13:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:06,366 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2022-02-11 01:13:06,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2022-02-11 01:13:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:06,367 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:06,367 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:06,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 01:13:06,368 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1202883661, now seen corresponding path program 3 times [2022-02-11 01:13:06,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:06,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185466142] [2022-02-11 01:13:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:06,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185466142] [2022-02-11 01:13:06,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185466142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:06,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:06,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 01:13:06,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861367786] [2022-02-11 01:13:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:13:06,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:13:06,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:13:06,423 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:06,486 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2022-02-11 01:13:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 01:13:06,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:06,489 INFO L225 Difference]: With dead ends: 438 [2022-02-11 01:13:06,489 INFO L226 Difference]: Without dead ends: 438 [2022-02-11 01:13:06,489 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:13:06,490 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:06,491 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:13:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-11 01:13:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2022-02-11 01:13:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-02-11 01:13:06,498 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-02-11 01:13:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:06,498 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-02-11 01:13:06,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-02-11 01:13:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:06,499 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:06,499 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:06,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 01:13:06,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700470, now seen corresponding path program 3 times [2022-02-11 01:13:06,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:06,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562810328] [2022-02-11 01:13:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:06,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562810328] [2022-02-11 01:13:06,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562810328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:06,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028459748] [2022-02-11 01:13:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:06,579 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) [2022-02-11 01:13:06,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:13:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:13:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:13:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:06,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028459748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:06,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:06,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-11 01:13:06,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469900020] [2022-02-11 01:13:06,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:13:06,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:13:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:13:06,736 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:07,026 INFO L93 Difference]: Finished difference Result 1154 states and 3249 transitions. [2022-02-11 01:13:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 01:13:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:07,030 INFO L225 Difference]: With dead ends: 1154 [2022-02-11 01:13:07,030 INFO L226 Difference]: Without dead ends: 1154 [2022-02-11 01:13:07,031 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:13:07,031 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:07,031 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 89 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-02-11 01:13:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 323. [2022-02-11 01:13:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-02-11 01:13:07,056 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-02-11 01:13:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:07,057 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-02-11 01:13:07,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-02-11 01:13:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:07,058 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:07,058 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:07,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-11 01:13:07,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:07,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:07,277 INFO L85 PathProgramCache]: Analyzing trace with hash -731586770, now seen corresponding path program 2 times [2022-02-11 01:13:07,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:07,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568948513] [2022-02-11 01:13:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:07,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:07,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568948513] [2022-02-11 01:13:07,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568948513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:07,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:07,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 01:13:07,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055747] [2022-02-11 01:13:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:07,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 01:13:07,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 01:13:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-11 01:13:07,338 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:07,465 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2022-02-11 01:13:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:13:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:07,467 INFO L225 Difference]: With dead ends: 466 [2022-02-11 01:13:07,467 INFO L226 Difference]: Without dead ends: 466 [2022-02-11 01:13:07,467 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:07,469 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:07,469 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-02-11 01:13:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2022-02-11 01:13:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2022-02-11 01:13:07,476 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2022-02-11 01:13:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:07,476 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2022-02-11 01:13:07,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2022-02-11 01:13:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:07,478 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:07,478 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:07,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 01:13:07,478 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:07,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1391482172, now seen corresponding path program 4 times [2022-02-11 01:13:07,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:07,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276752521] [2022-02-11 01:13:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:07,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:07,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276752521] [2022-02-11 01:13:07,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276752521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:07,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:07,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 01:13:07,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789152633] [2022-02-11 01:13:07,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:07,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:13:07,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:13:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:13:07,535 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:07,634 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2022-02-11 01:13:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 01:13:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:07,637 INFO L225 Difference]: With dead ends: 541 [2022-02-11 01:13:07,637 INFO L226 Difference]: Without dead ends: 537 [2022-02-11 01:13:07,637 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:13:07,638 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:07,638 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-02-11 01:13:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2022-02-11 01:13:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2022-02-11 01:13:07,645 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2022-02-11 01:13:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:07,645 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2022-02-11 01:13:07,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2022-02-11 01:13:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:07,647 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:07,647 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:07,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-11 01:13:07,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1513963908, now seen corresponding path program 5 times [2022-02-11 01:13:07,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:07,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061463112] [2022-02-11 01:13:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:07,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061463112] [2022-02-11 01:13:07,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061463112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:07,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631197687] [2022-02-11 01:13:07,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:07,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:07,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:07,706 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) [2022-02-11 01:13:07,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:07,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 01:13:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:07,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:13:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631197687] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:07,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-11 01:13:07,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2022-02-11 01:13:07,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041630314] [2022-02-11 01:13:07,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:07,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:13:07,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:13:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:07,858 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:07,982 INFO L93 Difference]: Finished difference Result 653 states and 1834 transitions. [2022-02-11 01:13:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 01:13:07,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:07,986 INFO L225 Difference]: With dead ends: 653 [2022-02-11 01:13:07,986 INFO L226 Difference]: Without dead ends: 653 [2022-02-11 01:13:07,987 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:07,987 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:07,987 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 63 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-11 01:13:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 278. [2022-02-11 01:13:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2022-02-11 01:13:07,994 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2022-02-11 01:13:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:07,994 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2022-02-11 01:13:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2022-02-11 01:13:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 01:13:07,995 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:07,996 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:08,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:08,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:08,212 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 268685562, now seen corresponding path program 6 times [2022-02-11 01:13:08,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:08,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418551734] [2022-02-11 01:13:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:08,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418551734] [2022-02-11 01:13:08,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418551734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:13:08,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:13:08,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-11 01:13:08,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266755937] [2022-02-11 01:13:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:13:08,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:13:08,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:13:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:13:08,248 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:08,323 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-02-11 01:13:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:13:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 01:13:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:08,326 INFO L225 Difference]: With dead ends: 429 [2022-02-11 01:13:08,326 INFO L226 Difference]: Without dead ends: 425 [2022-02-11 01:13:08,326 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-11 01:13:08,326 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:08,327 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-11 01:13:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2022-02-11 01:13:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2022-02-11 01:13:08,333 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2022-02-11 01:13:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2022-02-11 01:13:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2022-02-11 01:13:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:08,335 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:08,335 INFO L515 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] [2022-02-11 01:13:08,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-11 01:13:08,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1300936698, now seen corresponding path program 1 times [2022-02-11 01:13:08,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:08,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006733644] [2022-02-11 01:13:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:08,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006733644] [2022-02-11 01:13:08,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006733644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:08,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467445252] [2022-02-11 01:13:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:08,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:08,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:08,423 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) [2022-02-11 01:13:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:13:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 01:13:08,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:08,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 01:13:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:08,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:08,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:08,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467445252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:08,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:08,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-11 01:13:08,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761530730] [2022-02-11 01:13:08,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:08,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 01:13:08,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 01:13:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:13:08,733 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:08,800 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2022-02-11 01:13:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:13:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:08,802 INFO L225 Difference]: With dead ends: 552 [2022-02-11 01:13:08,802 INFO L226 Difference]: Without dead ends: 537 [2022-02-11 01:13:08,803 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:13:08,803 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:08,803 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:13:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-02-11 01:13:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2022-02-11 01:13:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2022-02-11 01:13:08,811 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2022-02-11 01:13:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:08,811 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2022-02-11 01:13:08,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2022-02-11 01:13:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:08,812 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:08,812 INFO L515 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] [2022-02-11 01:13:08,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:09,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 01:13:09,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1432556635, now seen corresponding path program 1 times [2022-02-11 01:13:09,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:09,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843322491] [2022-02-11 01:13:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:09,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:09,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843322491] [2022-02-11 01:13:09,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843322491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:09,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680797755] [2022-02-11 01:13:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:09,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:09,203 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) [2022-02-11 01:13:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:13:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:09,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:09,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:13:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:09,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:09,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:09,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:09,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680797755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:09,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:09,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-02-11 01:13:09,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926706479] [2022-02-11 01:13:09,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:09,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 01:13:09,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 01:13:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-11 01:13:09,682 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-11 01:13:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:10,631 INFO L93 Difference]: Finished difference Result 850 states and 2460 transitions. [2022-02-11 01:13:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:13:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 24 [2022-02-11 01:13:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:10,635 INFO L225 Difference]: With dead ends: 850 [2022-02-11 01:13:10,635 INFO L226 Difference]: Without dead ends: 835 [2022-02-11 01:13:10,635 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:13:10,635 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:10,635 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-11 01:13:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 438. [2022-02-11 01:13:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2022-02-11 01:13:10,644 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2022-02-11 01:13:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:10,645 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2022-02-11 01:13:10,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-11 01:13:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2022-02-11 01:13:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:10,646 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:10,646 INFO L515 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] [2022-02-11 01:13:10,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:10,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:10,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1637705597, now seen corresponding path program 2 times [2022-02-11 01:13:10,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:10,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704451312] [2022-02-11 01:13:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:11,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:11,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704451312] [2022-02-11 01:13:11,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704451312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:11,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821793531] [2022-02-11 01:13:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:11,060 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) [2022-02-11 01:13:11,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:13:11,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:11,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:11,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:11,270 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 35 treesize of output 36 [2022-02-11 01:13:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:11,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:11,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:11,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:11,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:11,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821793531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:11,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:11,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-02-11 01:13:11,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844348855] [2022-02-11 01:13:11,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:11,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 01:13:11,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 01:13:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-11 01:13:11,525 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:12,766 INFO L93 Difference]: Finished difference Result 1170 states and 3382 transitions. [2022-02-11 01:13:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:13:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:12,771 INFO L225 Difference]: With dead ends: 1170 [2022-02-11 01:13:12,771 INFO L226 Difference]: Without dead ends: 1155 [2022-02-11 01:13:12,771 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:13:12,772 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 270 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:12,772 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 222 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-02-11 01:13:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 439. [2022-02-11 01:13:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2022-02-11 01:13:12,782 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2022-02-11 01:13:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:12,782 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2022-02-11 01:13:12,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2022-02-11 01:13:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:12,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:12,783 INFO L515 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] [2022-02-11 01:13:12,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:13,000 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 142032238, now seen corresponding path program 2 times [2022-02-11 01:13:13,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:13,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313910365] [2022-02-11 01:13:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:13,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:13,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313910365] [2022-02-11 01:13:13,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313910365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:13,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415921151] [2022-02-11 01:13:13,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:13,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:13,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:13,054 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) [2022-02-11 01:13:13,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:13:13,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 01:13:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:13,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 01:13:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:13,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:13,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:13,275 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 11 treesize of output 16 [2022-02-11 01:13:13,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-02-11 01:13:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:13,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415921151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:13,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:13,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-11 01:13:13,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365064455] [2022-02-11 01:13:13,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:13,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 01:13:13,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 01:13:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 01:13:13,336 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2022-02-11 01:13:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:13,415 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2022-02-11 01:13:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 01:13:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 24 [2022-02-11 01:13:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:13,417 INFO L225 Difference]: With dead ends: 645 [2022-02-11 01:13:13,417 INFO L226 Difference]: Without dead ends: 630 [2022-02-11 01:13:13,417 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-11 01:13:13,418 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:13,418 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-11 01:13:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2022-02-11 01:13:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2022-02-11 01:13:13,426 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2022-02-11 01:13:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:13,427 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2022-02-11 01:13:13,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2022-02-11 01:13:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2022-02-11 01:13:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:13,428 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:13,428 INFO L515 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] [2022-02-11 01:13:13,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:13,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-11 01:13:13,644 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1337506361, now seen corresponding path program 3 times [2022-02-11 01:13:13,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:13,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633268903] [2022-02-11 01:13:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:13,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:13,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633268903] [2022-02-11 01:13:13,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633268903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:13,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649378657] [2022-02-11 01:13:13,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:13,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:13,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:13,809 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) [2022-02-11 01:13:13,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:13:13,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:13:13,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:13,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 01:13:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:14,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:14,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:14,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:14,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:14,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649378657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:14,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:14,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-02-11 01:13:14,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138691283] [2022-02-11 01:13:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:14,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:13:14,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:13:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:14,189 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-11 01:13:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:14,470 INFO L93 Difference]: Finished difference Result 679 states and 1940 transitions. [2022-02-11 01:13:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:13:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 [2022-02-11 01:13:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:14,472 INFO L225 Difference]: With dead ends: 679 [2022-02-11 01:13:14,472 INFO L226 Difference]: Without dead ends: 664 [2022-02-11 01:13:14,473 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-11 01:13:14,473 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:14,473 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 139 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-02-11 01:13:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 465. [2022-02-11 01:13:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2022-02-11 01:13:14,485 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2022-02-11 01:13:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:14,485 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2022-02-11 01:13:14,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-11 01:13:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2022-02-11 01:13:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:14,486 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:14,486 INFO L515 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] [2022-02-11 01:13:14,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:14,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-11 01:13:14,702 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 857029177, now seen corresponding path program 4 times [2022-02-11 01:13:14,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:14,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360263383] [2022-02-11 01:13:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:14,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:14,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360263383] [2022-02-11 01:13:14,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360263383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:14,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105339352] [2022-02-11 01:13:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:14,838 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) [2022-02-11 01:13:14,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:13:14,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:14,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:15,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 01:13:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:15,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:15,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:15,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:15,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:15,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105339352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:15,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:15,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-11 01:13:15,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038718569] [2022-02-11 01:13:15,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:15,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:15,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:15,239 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:15,603 INFO L93 Difference]: Finished difference Result 794 states and 2321 transitions. [2022-02-11 01:13:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 01:13:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:15,606 INFO L225 Difference]: With dead ends: 794 [2022-02-11 01:13:15,606 INFO L226 Difference]: Without dead ends: 779 [2022-02-11 01:13:15,606 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-11 01:13:15,607 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:15,607 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 138 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-02-11 01:13:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 469. [2022-02-11 01:13:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2022-02-11 01:13:15,616 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2022-02-11 01:13:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:15,616 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2022-02-11 01:13:15,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2022-02-11 01:13:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:15,617 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:15,617 INFO L515 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] [2022-02-11 01:13:15,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:15,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 01:13:15,838 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1638934791, now seen corresponding path program 5 times [2022-02-11 01:13:15,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:15,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989209991] [2022-02-11 01:13:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:15,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:16,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:16,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989209991] [2022-02-11 01:13:16,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989209991] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:16,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718210435] [2022-02-11 01:13:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:16,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:16,062 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) [2022-02-11 01:13:16,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:13:16,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:16,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:16,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:16,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-11 01:13:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:16,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:16,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:16,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:16,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:16,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718210435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:16,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:16,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-11 01:13:16,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576697778] [2022-02-11 01:13:16,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:16,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:13:16,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:13:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:13:16,548 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-02-11 01:13:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:17,119 INFO L93 Difference]: Finished difference Result 1008 states and 2935 transitions. [2022-02-11 01:13:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:13:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 [2022-02-11 01:13:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:17,124 INFO L225 Difference]: With dead ends: 1008 [2022-02-11 01:13:17,124 INFO L226 Difference]: Without dead ends: 978 [2022-02-11 01:13:17,124 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:13:17,125 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:17,125 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 217 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 445 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-11 01:13:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-02-11 01:13:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 471. [2022-02-11 01:13:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9574468085106385) internal successors, (1390), 470 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1390 transitions. [2022-02-11 01:13:17,136 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1390 transitions. Word has length 24 [2022-02-11 01:13:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:17,136 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1390 transitions. [2022-02-11 01:13:17,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-02-11 01:13:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1390 transitions. [2022-02-11 01:13:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:17,137 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:17,138 INFO L515 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] [2022-02-11 01:13:17,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:17,354 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash -931811517, now seen corresponding path program 6 times [2022-02-11 01:13:17,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:17,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898995651] [2022-02-11 01:13:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:17,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:17,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:17,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898995651] [2022-02-11 01:13:17,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898995651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:17,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961864860] [2022-02-11 01:13:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:17,507 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) [2022-02-11 01:13:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:13:17,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:13:17,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:17,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 01:13:17,705 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 38 treesize of output 34 [2022-02-11 01:13:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:17,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:17,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:17,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:17,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:17,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961864860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:17,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:17,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-02-11 01:13:17,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838302361] [2022-02-11 01:13:17,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:17,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:13:17,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:13:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:17,914 INFO L87 Difference]: Start difference. First operand 471 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:18,865 INFO L93 Difference]: Finished difference Result 935 states and 2730 transitions. [2022-02-11 01:13:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:13:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:18,869 INFO L225 Difference]: With dead ends: 935 [2022-02-11 01:13:18,869 INFO L226 Difference]: Without dead ends: 920 [2022-02-11 01:13:18,870 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:13:18,870 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:18,870 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 575 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-02-11 01:13:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-11 01:13:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 487. [2022-02-11 01:13:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.9794238683127574) internal successors, (1448), 486 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1448 transitions. [2022-02-11 01:13:18,882 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1448 transitions. Word has length 24 [2022-02-11 01:13:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:18,882 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1448 transitions. [2022-02-11 01:13:18,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1448 transitions. [2022-02-11 01:13:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:18,883 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:18,884 INFO L515 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] [2022-02-11 01:13:18,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:19,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:19,100 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1768350663, now seen corresponding path program 7 times [2022-02-11 01:13:19,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:19,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436388173] [2022-02-11 01:13:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:19,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:19,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436388173] [2022-02-11 01:13:19,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436388173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:19,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485717208] [2022-02-11 01:13:19,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:19,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:19,341 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) [2022-02-11 01:13:19,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:13:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:19,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:19,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 01:13:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:19,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:19,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:19,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:19,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:19,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485717208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:19,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:19,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-11 01:13:19,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096720136] [2022-02-11 01:13:19,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:19,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:13:19,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:13:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:13:19,800 INFO L87 Difference]: Start difference. First operand 487 states and 1448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-02-11 01:13:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:20,219 INFO L93 Difference]: Finished difference Result 1068 states and 3118 transitions. [2022-02-11 01:13:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:13:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 [2022-02-11 01:13:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:20,223 INFO L225 Difference]: With dead ends: 1068 [2022-02-11 01:13:20,223 INFO L226 Difference]: Without dead ends: 1038 [2022-02-11 01:13:20,223 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:13:20,224 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:20,224 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 187 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-11 01:13:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-02-11 01:13:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 483. [2022-02-11 01:13:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.975103734439834) internal successors, (1434), 482 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1434 transitions. [2022-02-11 01:13:20,234 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1434 transitions. Word has length 24 [2022-02-11 01:13:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:20,234 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1434 transitions. [2022-02-11 01:13:20,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-02-11 01:13:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1434 transitions. [2022-02-11 01:13:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:20,235 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:20,235 INFO L515 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] [2022-02-11 01:13:20,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:20,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-11 01:13:20,463 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 906932625, now seen corresponding path program 8 times [2022-02-11 01:13:20,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:20,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106028261] [2022-02-11 01:13:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:20,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:20,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106028261] [2022-02-11 01:13:20,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106028261] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:20,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796047981] [2022-02-11 01:13:20,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:20,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:20,662 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) [2022-02-11 01:13:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:13:20,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:20,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:20,819 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 35 treesize of output 36 [2022-02-11 01:13:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:20,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:21,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:21,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:21,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:21,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796047981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:21,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:21,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-02-11 01:13:21,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964854159] [2022-02-11 01:13:21,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:21,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 01:13:21,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 01:13:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-11 01:13:21,124 INFO L87 Difference]: Start difference. First operand 483 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:22,727 INFO L93 Difference]: Finished difference Result 1208 states and 3557 transitions. [2022-02-11 01:13:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:13:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:22,732 INFO L225 Difference]: With dead ends: 1208 [2022-02-11 01:13:22,732 INFO L226 Difference]: Without dead ends: 1193 [2022-02-11 01:13:22,733 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 01:13:22,733 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 231 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:22,733 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-02-11 01:13:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 473. [2022-02-11 01:13:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9533898305084745) internal successors, (1394), 472 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1394 transitions. [2022-02-11 01:13:22,744 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1394 transitions. Word has length 24 [2022-02-11 01:13:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:22,744 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1394 transitions. [2022-02-11 01:13:22,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1394 transitions. [2022-02-11 01:13:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:13:22,745 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:22,745 INFO L515 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] [2022-02-11 01:13:22,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:22,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:22,963 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1310802373, now seen corresponding path program 9 times [2022-02-11 01:13:22,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:22,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927499208] [2022-02-11 01:13:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:22,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:23,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:23,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927499208] [2022-02-11 01:13:23,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927499208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:23,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885578391] [2022-02-11 01:13:23,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:23,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:23,127 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) [2022-02-11 01:13:23,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:13:23,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:13:23,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:13:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:23,331 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 01:13:23,332 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 35 treesize of output 31 [2022-02-11 01:13:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:23,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:23,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-11 01:13:23,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-11 01:13:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:23,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885578391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:23,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:23,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-02-11 01:13:23,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195534186] [2022-02-11 01:13:23,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:23,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:13:23,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:13:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:23,548 INFO L87 Difference]: Start difference. First operand 473 states and 1394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:24,273 INFO L93 Difference]: Finished difference Result 904 states and 2639 transitions. [2022-02-11 01:13:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:13:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 01:13:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:24,276 INFO L225 Difference]: With dead ends: 904 [2022-02-11 01:13:24,276 INFO L226 Difference]: Without dead ends: 889 [2022-02-11 01:13:24,277 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:13:24,277 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:24,277 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 422 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-02-11 01:13:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-11 01:13:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 471. [2022-02-11 01:13:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2022-02-11 01:13:24,299 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2022-02-11 01:13:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2022-02-11 01:13:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2022-02-11 01:13:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:24,324 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:24,325 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:24,525 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065829, now seen corresponding path program 3 times [2022-02-11 01:13:24,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:24,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082599082] [2022-02-11 01:13:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:24,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:24,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:24,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082599082] [2022-02-11 01:13:24,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082599082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:24,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386270898] [2022-02-11 01:13:24,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:24,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:24,574 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) [2022-02-11 01:13:24,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:13:24,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:13:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:24,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:24,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386270898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:24,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:24,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:13:24,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463305894] [2022-02-11 01:13:24,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:24,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:13:24,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:24,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:13:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:24,817 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:26,199 INFO L93 Difference]: Finished difference Result 3570 states and 10088 transitions. [2022-02-11 01:13:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 01:13:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:26,222 INFO L225 Difference]: With dead ends: 3570 [2022-02-11 01:13:26,222 INFO L226 Difference]: Without dead ends: 3570 [2022-02-11 01:13:26,224 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1738, Invalid=6272, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 01:13:26,224 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 590 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:26,225 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 330 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:13:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-02-11 01:13:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 658. [2022-02-11 01:13:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2739726027397262) internal successors, (2151), 657 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2151 transitions. [2022-02-11 01:13:26,259 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2151 transitions. Word has length 27 [2022-02-11 01:13:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:26,260 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2151 transitions. [2022-02-11 01:13:26,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2151 transitions. [2022-02-11 01:13:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:26,261 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:26,261 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:26,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:26,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-11 01:13:26,475 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1967000799, now seen corresponding path program 4 times [2022-02-11 01:13:26,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:26,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684323699] [2022-02-11 01:13:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:26,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:26,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684323699] [2022-02-11 01:13:26,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684323699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:26,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356176683] [2022-02-11 01:13:26,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:26,518 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) [2022-02-11 01:13:26,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:13:26,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:26,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:26,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356176683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:26,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:26,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:13:26,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790678983] [2022-02-11 01:13:26,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:13:26,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:13:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:13:26,689 INFO L87 Difference]: Start difference. First operand 658 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:28,494 INFO L93 Difference]: Finished difference Result 3557 states and 10114 transitions. [2022-02-11 01:13:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-11 01:13:28,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:28,502 INFO L225 Difference]: With dead ends: 3557 [2022-02-11 01:13:28,502 INFO L226 Difference]: Without dead ends: 3557 [2022-02-11 01:13:28,505 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2334, Invalid=9876, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:13:28,506 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 639 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:28,506 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 439 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:13:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-02-11 01:13:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 642. [2022-02-11 01:13:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.2449297971918876) internal successors, (2080), 641 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2080 transitions. [2022-02-11 01:13:28,540 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2080 transitions. Word has length 27 [2022-02-11 01:13:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:28,540 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2080 transitions. [2022-02-11 01:13:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2080 transitions. [2022-02-11 01:13:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:28,542 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:28,542 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:28,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:28,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:28,755 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1712302181, now seen corresponding path program 5 times [2022-02-11 01:13:28,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:28,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789621414] [2022-02-11 01:13:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:28,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789621414] [2022-02-11 01:13:28,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789621414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780499320] [2022-02-11 01:13:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:28,784 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) [2022-02-11 01:13:28,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:13:28,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:13:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:28,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:28,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780499320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:28,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:28,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:13:28,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743259075] [2022-02-11 01:13:28,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:28,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:13:28,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:13:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:13:28,993 INFO L87 Difference]: Start difference. First operand 642 states and 2080 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2022-02-11 01:13:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:29,747 INFO L93 Difference]: Finished difference Result 2695 states and 7631 transitions. [2022-02-11 01:13:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:13:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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 27 [2022-02-11 01:13:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:29,753 INFO L225 Difference]: With dead ends: 2695 [2022-02-11 01:13:29,753 INFO L226 Difference]: Without dead ends: 2695 [2022-02-11 01:13:29,754 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1021, Invalid=3671, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:13:29,755 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:29,756 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 280 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:13:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-02-11 01:13:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 650. [2022-02-11 01:13:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2342064714946073) internal successors, (2099), 649 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2099 transitions. [2022-02-11 01:13:29,779 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2099 transitions. Word has length 27 [2022-02-11 01:13:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:29,779 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2099 transitions. [2022-02-11 01:13:29,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2022-02-11 01:13:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2099 transitions. [2022-02-11 01:13:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:29,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:29,781 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:29,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:29,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:29,998 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash 599427504, now seen corresponding path program 10 times [2022-02-11 01:13:29,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:29,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731697618] [2022-02-11 01:13:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:30,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:30,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731697618] [2022-02-11 01:13:30,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731697618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:30,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828359387] [2022-02-11 01:13:30,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:30,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:30,055 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) [2022-02-11 01:13:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:13:30,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:30,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:30,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:30,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828359387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:30,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:30,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:13:30,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19337710] [2022-02-11 01:13:30,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:13:30,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:13:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:13:30,310 INFO L87 Difference]: Start difference. First operand 650 states and 2099 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-02-11 01:13:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:31,122 INFO L93 Difference]: Finished difference Result 2700 states and 7794 transitions. [2022-02-11 01:13:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:13:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 27 [2022-02-11 01:13:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:31,128 INFO L225 Difference]: With dead ends: 2700 [2022-02-11 01:13:31,128 INFO L226 Difference]: Without dead ends: 2700 [2022-02-11 01:13:31,129 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 01:13:31,129 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 418 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:31,129 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 242 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-02-11 01:13:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 669. [2022-02-11 01:13:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2230538922155687) internal successors, (2153), 668 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2153 transitions. [2022-02-11 01:13:31,174 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2153 transitions. Word has length 27 [2022-02-11 01:13:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:31,174 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2153 transitions. [2022-02-11 01:13:31,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-02-11 01:13:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2153 transitions. [2022-02-11 01:13:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:31,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:31,175 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:31,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:31,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:31,391 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1019160408, now seen corresponding path program 6 times [2022-02-11 01:13:31,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:31,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212347564] [2022-02-11 01:13:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:31,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:31,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212347564] [2022-02-11 01:13:31,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212347564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:31,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615646530] [2022-02-11 01:13:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:31,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:31,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:31,430 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) [2022-02-11 01:13:31,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:13:31,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:13:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:31,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:31,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615646530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:31,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:31,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 01:13:31,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968063105] [2022-02-11 01:13:31,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:31,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:13:31,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:13:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:13:31,550 INFO L87 Difference]: Start difference. First operand 669 states and 2153 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-02-11 01:13:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:31,666 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2022-02-11 01:13:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 01:13:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 27 [2022-02-11 01:13:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:31,669 INFO L225 Difference]: With dead ends: 1474 [2022-02-11 01:13:31,669 INFO L226 Difference]: Without dead ends: 1450 [2022-02-11 01:13:31,670 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-02-11 01:13:31,670 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:31,670 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 85 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-02-11 01:13:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1011. [2022-02-11 01:13:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.291089108910891) internal successors, (3324), 1010 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3324 transitions. [2022-02-11 01:13:31,688 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3324 transitions. Word has length 27 [2022-02-11 01:13:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:31,689 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3324 transitions. [2022-02-11 01:13:31,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-02-11 01:13:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3324 transitions. [2022-02-11 01:13:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:31,690 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:31,690 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:31,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:31,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 01:13:31,908 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1294087731, now seen corresponding path program 1 times [2022-02-11 01:13:31,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:31,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299894198] [2022-02-11 01:13:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:31,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:31,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299894198] [2022-02-11 01:13:31,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299894198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:31,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930695889] [2022-02-11 01:13:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:31,943 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) [2022-02-11 01:13:31,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:13:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:31,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930695889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:32,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:32,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:13:32,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325815373] [2022-02-11 01:13:32,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:32,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:32,072 INFO L87 Difference]: Start difference. First operand 1011 states and 3324 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2022-02-11 01:13:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:32,444 INFO L93 Difference]: Finished difference Result 2336 states and 6930 transitions. [2022-02-11 01:13:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:13:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 27 [2022-02-11 01:13:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:32,448 INFO L225 Difference]: With dead ends: 2336 [2022-02-11 01:13:32,448 INFO L226 Difference]: Without dead ends: 2310 [2022-02-11 01:13:32,449 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:13:32,456 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 334 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:32,456 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-02-11 01:13:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1264. [2022-02-11 01:13:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.32541567695962) internal successors, (4200), 1263 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4200 transitions. [2022-02-11 01:13:32,482 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4200 transitions. Word has length 27 [2022-02-11 01:13:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:32,482 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4200 transitions. [2022-02-11 01:13:32,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2022-02-11 01:13:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4200 transitions. [2022-02-11 01:13:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:32,485 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:32,485 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:32,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:32,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 01:13:32,701 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash -374136488, now seen corresponding path program 11 times [2022-02-11 01:13:32,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:32,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539235049] [2022-02-11 01:13:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:32,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:32,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539235049] [2022-02-11 01:13:32,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539235049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:32,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888258120] [2022-02-11 01:13:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:32,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:32,749 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) [2022-02-11 01:13:32,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:13:32,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:13:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888258120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:32,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:32,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:13:32,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588473343] [2022-02-11 01:13:32,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:32,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:13:32,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:13:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:13:32,949 INFO L87 Difference]: Start difference. First operand 1264 states and 4200 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-11 01:13:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:33,236 INFO L93 Difference]: Finished difference Result 3138 states and 9728 transitions. [2022-02-11 01:13:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 01:13:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2022-02-11 01:13:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:33,260 INFO L225 Difference]: With dead ends: 3138 [2022-02-11 01:13:33,260 INFO L226 Difference]: Without dead ends: 3099 [2022-02-11 01:13:33,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:13:33,261 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:33,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 212 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-02-11 01:13:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1754. [2022-02-11 01:13:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.407872219053052) internal successors, (5974), 1753 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5974 transitions. [2022-02-11 01:13:33,302 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5974 transitions. Word has length 27 [2022-02-11 01:13:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:33,302 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5974 transitions. [2022-02-11 01:13:33,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-11 01:13:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5974 transitions. [2022-02-11 01:13:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:33,305 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:33,305 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:33,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:33,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:33,515 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1217309363, now seen corresponding path program 2 times [2022-02-11 01:13:33,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:33,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404717174] [2022-02-11 01:13:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:33,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:33,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404717174] [2022-02-11 01:13:33,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404717174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:33,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233927749] [2022-02-11 01:13:33,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:33,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:33,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:33,564 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) [2022-02-11 01:13:33,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:13:33,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:33,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:33,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:33,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233927749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:33,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:33,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:13:33,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850194827] [2022-02-11 01:13:33,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:33,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:33,714 INFO L87 Difference]: Start difference. First operand 1754 states and 5974 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:34,012 INFO L93 Difference]: Finished difference Result 2934 states and 9093 transitions. [2022-02-11 01:13:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 01:13:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:34,017 INFO L225 Difference]: With dead ends: 2934 [2022-02-11 01:13:34,017 INFO L226 Difference]: Without dead ends: 2912 [2022-02-11 01:13:34,017 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:13:34,018 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:34,019 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 109 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-02-11 01:13:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1747. [2022-02-11 01:13:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.413516609392898) internal successors, (5960), 1746 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5960 transitions. [2022-02-11 01:13:34,086 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5960 transitions. Word has length 27 [2022-02-11 01:13:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5960 transitions. [2022-02-11 01:13:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5960 transitions. [2022-02-11 01:13:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:34,089 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:34,089 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:34,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:34,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:34,305 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2125115793, now seen corresponding path program 3 times [2022-02-11 01:13:34,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:34,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120936539] [2022-02-11 01:13:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:34,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:34,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:34,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120936539] [2022-02-11 01:13:34,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120936539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:34,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855546533] [2022-02-11 01:13:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:34,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:34,339 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) [2022-02-11 01:13:34,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:13:34,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:13:34,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:34,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:34,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855546533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:34,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:34,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 01:13:34,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458885771] [2022-02-11 01:13:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:34,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:34,486 INFO L87 Difference]: Start difference. First operand 1747 states and 5960 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:34,790 INFO L93 Difference]: Finished difference Result 4585 states and 13921 transitions. [2022-02-11 01:13:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 01:13:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-02-11 01:13:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:34,799 INFO L225 Difference]: With dead ends: 4585 [2022-02-11 01:13:34,800 INFO L226 Difference]: Without dead ends: 4559 [2022-02-11 01:13:34,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:13:34,800 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 355 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:34,801 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 98 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2022-02-11 01:13:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1846. [2022-02-11 01:13:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.4655826558265583) internal successors, (6394), 1845 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6394 transitions. [2022-02-11 01:13:34,866 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6394 transitions. Word has length 27 [2022-02-11 01:13:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:34,866 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6394 transitions. [2022-02-11 01:13:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6394 transitions. [2022-02-11 01:13:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:34,869 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:34,869 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:34,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:35,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:35,085 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash -665957700, now seen corresponding path program 7 times [2022-02-11 01:13:35,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:35,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384514101] [2022-02-11 01:13:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:35,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:35,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384514101] [2022-02-11 01:13:35,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384514101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:35,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002406473] [2022-02-11 01:13:35,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:35,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:35,113 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) [2022-02-11 01:13:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:13:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:35,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:35,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:35,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002406473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:35,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:35,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-02-11 01:13:35,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108961311] [2022-02-11 01:13:35,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:35,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:35,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:35,286 INFO L87 Difference]: Start difference. First operand 1846 states and 6394 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:13:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:35,557 INFO L93 Difference]: Finished difference Result 3417 states and 10465 transitions. [2022-02-11 01:13:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 01:13:35,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-02-11 01:13:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:35,562 INFO L225 Difference]: With dead ends: 3417 [2022-02-11 01:13:35,562 INFO L226 Difference]: Without dead ends: 3417 [2022-02-11 01:13:35,563 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:13:35,563 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 356 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:35,563 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 125 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-02-11 01:13:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1858. [2022-02-11 01:13:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4426494345718903) internal successors, (6393), 1857 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6393 transitions. [2022-02-11 01:13:35,598 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6393 transitions. Word has length 27 [2022-02-11 01:13:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:35,599 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6393 transitions. [2022-02-11 01:13:35,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:13:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6393 transitions. [2022-02-11 01:13:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:35,602 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:35,602 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:35,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-11 01:13:35,817 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1012536837, now seen corresponding path program 8 times [2022-02-11 01:13:35,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:35,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290323548] [2022-02-11 01:13:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:35,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:35,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290323548] [2022-02-11 01:13:35,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290323548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:35,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380432440] [2022-02-11 01:13:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:35,863 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) [2022-02-11 01:13:35,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:13:35,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:35,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:36,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380432440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:36,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:36,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-11 01:13:36,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737190684] [2022-02-11 01:13:36,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:36,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:36,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:36,008 INFO L87 Difference]: Start difference. First operand 1858 states and 6393 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:36,803 INFO L93 Difference]: Finished difference Result 7165 states and 21721 transitions. [2022-02-11 01:13:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 01:13:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:36,816 INFO L225 Difference]: With dead ends: 7165 [2022-02-11 01:13:36,816 INFO L226 Difference]: Without dead ends: 7165 [2022-02-11 01:13:36,817 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:13:36,817 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 535 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:36,817 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 215 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-02-11 01:13:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2005. [2022-02-11 01:13:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4865269461077846) internal successors, (6987), 2004 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6987 transitions. [2022-02-11 01:13:36,886 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6987 transitions. Word has length 27 [2022-02-11 01:13:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:36,886 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 6987 transitions. [2022-02-11 01:13:36,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6987 transitions. [2022-02-11 01:13:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:36,890 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:36,890 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:36,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-11 01:13:37,105 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 970143219, now seen corresponding path program 4 times [2022-02-11 01:13:37,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:37,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144047746] [2022-02-11 01:13:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:37,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:37,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144047746] [2022-02-11 01:13:37,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144047746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:37,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047789588] [2022-02-11 01:13:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:37,142 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) [2022-02-11 01:13:37,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:13:37,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:37,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:37,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:37,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047789588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:37,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:37,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 01:13:37,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105687923] [2022-02-11 01:13:37,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:37,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:37,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:37,316 INFO L87 Difference]: Start difference. First operand 2005 states and 6987 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:37,775 INFO L93 Difference]: Finished difference Result 4592 states and 14316 transitions. [2022-02-11 01:13:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 01:13:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-02-11 01:13:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:37,783 INFO L225 Difference]: With dead ends: 4592 [2022-02-11 01:13:37,783 INFO L226 Difference]: Without dead ends: 4592 [2022-02-11 01:13:37,783 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:13:37,784 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:37,784 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 148 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:13:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-02-11 01:13:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2181. [2022-02-11 01:13:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.5022935779816513) internal successors, (7635), 2180 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7635 transitions. [2022-02-11 01:13:37,883 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7635 transitions. Word has length 27 [2022-02-11 01:13:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:37,883 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7635 transitions. [2022-02-11 01:13:37,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-02-11 01:13:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7635 transitions. [2022-02-11 01:13:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:37,887 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:37,887 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:37,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-11 01:13:38,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-11 01:13:38,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1201755135, now seen corresponding path program 9 times [2022-02-11 01:13:38,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:38,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946919627] [2022-02-11 01:13:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:38,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:38,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946919627] [2022-02-11 01:13:38,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946919627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:38,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127715902] [2022-02-11 01:13:38,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:38,160 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) [2022-02-11 01:13:38,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:13:38,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:13:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:38,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:38,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127715902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:38,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:38,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-11 01:13:38,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578912543] [2022-02-11 01:13:38,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:38,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:38,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:38,358 INFO L87 Difference]: Start difference. First operand 2181 states and 7635 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:39,067 INFO L93 Difference]: Finished difference Result 7070 states and 21694 transitions. [2022-02-11 01:13:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:13:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:39,081 INFO L225 Difference]: With dead ends: 7070 [2022-02-11 01:13:39,081 INFO L226 Difference]: Without dead ends: 7062 [2022-02-11 01:13:39,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:13:39,083 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 523 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:39,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 191 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2022-02-11 01:13:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 2191. [2022-02-11 01:13:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.491324200913242) internal successors, (7646), 2190 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7646 transitions. [2022-02-11 01:13:39,224 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7646 transitions. Word has length 27 [2022-02-11 01:13:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:39,225 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7646 transitions. [2022-02-11 01:13:39,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7646 transitions. [2022-02-11 01:13:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:39,250 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:39,250 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:39,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 01:13:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:39,463 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 187766081, now seen corresponding path program 10 times [2022-02-11 01:13:39,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:39,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282347422] [2022-02-11 01:13:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:39,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:39,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:39,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282347422] [2022-02-11 01:13:39,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282347422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:39,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929513504] [2022-02-11 01:13:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:39,501 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) [2022-02-11 01:13:39,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:13:39,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:39,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:39,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:39,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929513504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:39,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:39,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:13:39,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861319997] [2022-02-11 01:13:39,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:39,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:39,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:39,695 INFO L87 Difference]: Start difference. First operand 2191 states and 7646 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:40,602 INFO L93 Difference]: Finished difference Result 7232 states and 21469 transitions. [2022-02-11 01:13:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:13:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:40,617 INFO L225 Difference]: With dead ends: 7232 [2022-02-11 01:13:40,617 INFO L226 Difference]: Without dead ends: 7232 [2022-02-11 01:13:40,618 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:13:40,618 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:40,619 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 303 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-02-11 01:13:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 2309. [2022-02-11 01:13:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.470103986135182) internal successors, (8009), 2308 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8009 transitions. [2022-02-11 01:13:40,726 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8009 transitions. Word has length 27 [2022-02-11 01:13:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:40,726 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8009 transitions. [2022-02-11 01:13:40,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8009 transitions. [2022-02-11 01:13:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:40,730 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:40,730 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:40,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-11 01:13:40,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 01:13:40,931 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1970415551, now seen corresponding path program 11 times [2022-02-11 01:13:40,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:40,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342000271] [2022-02-11 01:13:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:40,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:40,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:40,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342000271] [2022-02-11 01:13:40,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342000271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:40,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639903658] [2022-02-11 01:13:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:40,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:40,968 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) [2022-02-11 01:13:40,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:13:40,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:13:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:41,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:41,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639903658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:41,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:41,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:13:41,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276493967] [2022-02-11 01:13:41,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:41,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:41,119 INFO L87 Difference]: Start difference. First operand 2309 states and 8009 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:42,140 INFO L93 Difference]: Finished difference Result 7083 states and 21556 transitions. [2022-02-11 01:13:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-11 01:13:42,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:42,154 INFO L225 Difference]: With dead ends: 7083 [2022-02-11 01:13:42,154 INFO L226 Difference]: Without dead ends: 7075 [2022-02-11 01:13:42,154 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1646, Invalid=6010, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 01:13:42,155 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 589 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:42,155 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 293 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-02-11 01:13:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 2309. [2022-02-11 01:13:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.468370883882149) internal successors, (8005), 2308 states have internal predecessors, (8005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8005 transitions. [2022-02-11 01:13:42,222 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8005 transitions. Word has length 27 [2022-02-11 01:13:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:42,222 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8005 transitions. [2022-02-11 01:13:42,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8005 transitions. [2022-02-11 01:13:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:42,226 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:42,226 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:42,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:42,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-11 01:13:42,441 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1109408773, now seen corresponding path program 12 times [2022-02-11 01:13:42,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:42,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309090964] [2022-02-11 01:13:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:42,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:42,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309090964] [2022-02-11 01:13:42,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309090964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:42,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733655747] [2022-02-11 01:13:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:42,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:42,500 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) [2022-02-11 01:13:42,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:13:42,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:13:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:42,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:42,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733655747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:42,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:42,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:13:42,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7507434] [2022-02-11 01:13:42,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:13:42,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:13:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:13:42,721 INFO L87 Difference]: Start difference. First operand 2309 states and 8005 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:13:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:43,571 INFO L93 Difference]: Finished difference Result 6206 states and 18904 transitions. [2022-02-11 01:13:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:13:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-02-11 01:13:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:43,583 INFO L225 Difference]: With dead ends: 6206 [2022-02-11 01:13:43,583 INFO L226 Difference]: Without dead ends: 6206 [2022-02-11 01:13:43,584 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 01:13:43,584 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 422 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:43,584 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 301 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6206 states. [2022-02-11 01:13:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6206 to 2335. [2022-02-11 01:13:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 3.4670094258783206) internal successors, (8092), 2334 states have internal predecessors, (8092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 8092 transitions. [2022-02-11 01:13:43,645 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 8092 transitions. Word has length 27 [2022-02-11 01:13:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:43,645 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 8092 transitions. [2022-02-11 01:13:43,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:13:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 8092 transitions. [2022-02-11 01:13:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:43,649 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:43,649 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:43,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:43,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 01:13:43,863 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2007542286, now seen corresponding path program 12 times [2022-02-11 01:13:43,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:43,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227747840] [2022-02-11 01:13:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:43,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:43,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227747840] [2022-02-11 01:13:43,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227747840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:43,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067524177] [2022-02-11 01:13:43,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:43,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:43,898 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) [2022-02-11 01:13:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:13:43,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:13:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:44,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067524177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:44,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:44,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:13:44,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165331600] [2022-02-11 01:13:44,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:44,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:13:44,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:13:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:13:44,028 INFO L87 Difference]: Start difference. First operand 2335 states and 8092 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:44,434 INFO L93 Difference]: Finished difference Result 6462 states and 20430 transitions. [2022-02-11 01:13:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:13:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-02-11 01:13:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:44,447 INFO L225 Difference]: With dead ends: 6462 [2022-02-11 01:13:44,447 INFO L226 Difference]: Without dead ends: 6462 [2022-02-11 01:13:44,448 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:13:44,448 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:44,448 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 169 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-02-11 01:13:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 2361. [2022-02-11 01:13:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.465677966101695) internal successors, (8179), 2360 states have internal predecessors, (8179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8179 transitions. [2022-02-11 01:13:44,518 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8179 transitions. Word has length 27 [2022-02-11 01:13:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:44,518 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8179 transitions. [2022-02-11 01:13:44,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8179 transitions. [2022-02-11 01:13:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:44,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:44,522 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:44,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:44,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 01:13:44,739 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2095266658, now seen corresponding path program 13 times [2022-02-11 01:13:44,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:44,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866108275] [2022-02-11 01:13:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:44,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:44,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:44,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866108275] [2022-02-11 01:13:44,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866108275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:44,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991464251] [2022-02-11 01:13:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:44,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:44,784 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) [2022-02-11 01:13:44,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:13:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:44,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:44,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991464251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:44,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:44,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:13:44,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082774695] [2022-02-11 01:13:44,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:44,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:13:44,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:13:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:13:44,966 INFO L87 Difference]: Start difference. First operand 2361 states and 8179 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:45,697 INFO L93 Difference]: Finished difference Result 6568 states and 20814 transitions. [2022-02-11 01:13:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:13:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-02-11 01:13:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:45,710 INFO L225 Difference]: With dead ends: 6568 [2022-02-11 01:13:45,710 INFO L226 Difference]: Without dead ends: 6568 [2022-02-11 01:13:45,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:13:45,711 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:45,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 188 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-02-11 01:13:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 2497. [2022-02-11 01:13:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 3.4451121794871793) internal successors, (8599), 2496 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 8599 transitions. [2022-02-11 01:13:45,799 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 8599 transitions. Word has length 27 [2022-02-11 01:13:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:45,799 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 8599 transitions. [2022-02-11 01:13:45,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 8599 transitions. [2022-02-11 01:13:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:45,803 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:45,803 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:45,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:46,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-11 01:13:46,019 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1473299244, now seen corresponding path program 14 times [2022-02-11 01:13:46,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:46,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275940160] [2022-02-11 01:13:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:46,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:46,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275940160] [2022-02-11 01:13:46,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275940160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:46,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922973533] [2022-02-11 01:13:46,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:46,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:46,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:46,056 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) [2022-02-11 01:13:46,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:46,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:13:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922973533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:46,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:46,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-11 01:13:46,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022090656] [2022-02-11 01:13:46,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:46,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:46,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:46,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:46,227 INFO L87 Difference]: Start difference. First operand 2497 states and 8599 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:46,536 INFO L93 Difference]: Finished difference Result 5147 states and 16513 transitions. [2022-02-11 01:13:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 01:13:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:46,547 INFO L225 Difference]: With dead ends: 5147 [2022-02-11 01:13:46,547 INFO L226 Difference]: Without dead ends: 5147 [2022-02-11 01:13:46,547 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:13:46,548 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 291 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:46,548 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 183 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-02-11 01:13:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2941. [2022-02-11 01:13:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 3.463265306122449) internal successors, (10182), 2940 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 10182 transitions. [2022-02-11 01:13:46,608 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 10182 transitions. Word has length 27 [2022-02-11 01:13:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:46,609 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 10182 transitions. [2022-02-11 01:13:46,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 10182 transitions. [2022-02-11 01:13:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:46,614 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:46,614 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:46,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 01:13:46,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:46,830 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 649769698, now seen corresponding path program 15 times [2022-02-11 01:13:46,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:46,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492352205] [2022-02-11 01:13:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:46,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492352205] [2022-02-11 01:13:46,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492352205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:46,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523330308] [2022-02-11 01:13:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:46,878 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) [2022-02-11 01:13:46,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:13:46,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:13:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:47,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523330308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:47,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:47,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:13:47,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386946106] [2022-02-11 01:13:47,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:47,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:13:47,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:13:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:13:47,067 INFO L87 Difference]: Start difference. First operand 2941 states and 10182 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:47,682 INFO L93 Difference]: Finished difference Result 7126 states and 23054 transitions. [2022-02-11 01:13:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:13:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-02-11 01:13:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:47,697 INFO L225 Difference]: With dead ends: 7126 [2022-02-11 01:13:47,697 INFO L226 Difference]: Without dead ends: 7122 [2022-02-11 01:13:47,697 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:13:47,697 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:47,698 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 197 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:13:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-02-11 01:13:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 2923. [2022-02-11 01:13:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.4603011635865846) internal successors, (10111), 2922 states have internal predecessors, (10111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 10111 transitions. [2022-02-11 01:13:47,784 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 10111 transitions. Word has length 27 [2022-02-11 01:13:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 10111 transitions. [2022-02-11 01:13:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-02-11 01:13:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 10111 transitions. [2022-02-11 01:13:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:47,789 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:47,789 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:47,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:48,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-11 01:13:48,003 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1999520671, now seen corresponding path program 5 times [2022-02-11 01:13:48,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:48,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322759095] [2022-02-11 01:13:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:48,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:48,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:48,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322759095] [2022-02-11 01:13:48,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322759095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:48,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431323938] [2022-02-11 01:13:48,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:48,037 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) [2022-02-11 01:13:48,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:13:48,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:48,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:48,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431323938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:48,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:48,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:13:48,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989897634] [2022-02-11 01:13:48,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:48,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:48,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:48,212 INFO L87 Difference]: Start difference. First operand 2923 states and 10111 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:48,646 INFO L93 Difference]: Finished difference Result 4977 states and 15922 transitions. [2022-02-11 01:13:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 01:13:48,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:48,655 INFO L225 Difference]: With dead ends: 4977 [2022-02-11 01:13:48,656 INFO L226 Difference]: Without dead ends: 4962 [2022-02-11 01:13:48,656 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:13:48,656 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 350 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:48,656 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 117 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-02-11 01:13:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3080. [2022-02-11 01:13:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.505034101981163) internal successors, (10792), 3079 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 10792 transitions. [2022-02-11 01:13:48,714 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 10792 transitions. Word has length 27 [2022-02-11 01:13:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:48,714 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 10792 transitions. [2022-02-11 01:13:48,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 10792 transitions. [2022-02-11 01:13:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:48,720 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:48,720 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:48,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:48,935 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1750676451, now seen corresponding path program 6 times [2022-02-11 01:13:48,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:48,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526999309] [2022-02-11 01:13:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:48,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:48,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526999309] [2022-02-11 01:13:48,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526999309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:48,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010151077] [2022-02-11 01:13:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:48,972 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) [2022-02-11 01:13:48,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:13:48,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:13:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:49,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:49,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010151077] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:49,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:49,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 01:13:49,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084327690] [2022-02-11 01:13:49,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:49,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:13:49,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:13:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:13:49,156 INFO L87 Difference]: Start difference. First operand 3080 states and 10792 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:49,509 INFO L93 Difference]: Finished difference Result 5951 states and 18520 transitions. [2022-02-11 01:13:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:13:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:49,520 INFO L225 Difference]: With dead ends: 5951 [2022-02-11 01:13:49,520 INFO L226 Difference]: Without dead ends: 5951 [2022-02-11 01:13:49,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:13:49,521 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 360 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:49,521 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 139 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-02-11 01:13:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2989. [2022-02-11 01:13:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2988 states have (on average 3.4745649263721554) internal successors, (10382), 2988 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 10382 transitions. [2022-02-11 01:13:49,595 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 10382 transitions. Word has length 27 [2022-02-11 01:13:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:49,595 INFO L470 AbstractCegarLoop]: Abstraction has 2989 states and 10382 transitions. [2022-02-11 01:13:49,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 10382 transitions. [2022-02-11 01:13:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:49,600 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:49,600 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:49,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-11 01:13:49,814 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1579991646, now seen corresponding path program 16 times [2022-02-11 01:13:49,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:49,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017069046] [2022-02-11 01:13:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:49,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:49,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017069046] [2022-02-11 01:13:49,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017069046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:49,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112850424] [2022-02-11 01:13:49,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:49,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:49,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:49,871 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) [2022-02-11 01:13:49,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:13:49,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:49,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:50,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112850424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:50,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:50,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:13:50,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174186782] [2022-02-11 01:13:50,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:50,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:50,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:50,033 INFO L87 Difference]: Start difference. First operand 2989 states and 10382 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:51,121 INFO L93 Difference]: Finished difference Result 11830 states and 37070 transitions. [2022-02-11 01:13:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 01:13:51,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:51,148 INFO L225 Difference]: With dead ends: 11830 [2022-02-11 01:13:51,149 INFO L226 Difference]: Without dead ends: 11830 [2022-02-11 01:13:51,150 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1772, Invalid=6418, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:13:51,150 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 706 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:51,150 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 311 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2022-02-11 01:13:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 3006. [2022-02-11 01:13:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.485524126455907) internal successors, (10474), 3005 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 10474 transitions. [2022-02-11 01:13:51,279 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 10474 transitions. Word has length 27 [2022-02-11 01:13:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:51,279 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 10474 transitions. [2022-02-11 01:13:51,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 10474 transitions. [2022-02-11 01:13:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:51,284 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:51,285 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:51,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:51,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 01:13:51,500 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1773892314, now seen corresponding path program 17 times [2022-02-11 01:13:51,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:51,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351053007] [2022-02-11 01:13:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:51,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:51,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351053007] [2022-02-11 01:13:51,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351053007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:51,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034811158] [2022-02-11 01:13:51,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:51,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:51,537 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) [2022-02-11 01:13:51,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:13:51,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:13:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:51,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:51,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034811158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:51,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:51,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-11 01:13:51,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960319148] [2022-02-11 01:13:51,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:51,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:51,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:51,748 INFO L87 Difference]: Start difference. First operand 3006 states and 10474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:52,720 INFO L93 Difference]: Finished difference Result 9772 states and 30478 transitions. [2022-02-11 01:13:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 01:13:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:52,740 INFO L225 Difference]: With dead ends: 9772 [2022-02-11 01:13:52,740 INFO L226 Difference]: Without dead ends: 9772 [2022-02-11 01:13:52,747 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1283, Invalid=3829, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:13:52,748 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 609 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:52,748 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 289 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2022-02-11 01:13:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 2975. [2022-02-11 01:13:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.4714189643577673) internal successors, (10324), 2974 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10324 transitions. [2022-02-11 01:13:52,857 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10324 transitions. Word has length 27 [2022-02-11 01:13:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:52,857 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 10324 transitions. [2022-02-11 01:13:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10324 transitions. [2022-02-11 01:13:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:52,862 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:52,862 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:52,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 01:13:53,069 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash -225266257, now seen corresponding path program 7 times [2022-02-11 01:13:53,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:53,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666981362] [2022-02-11 01:13:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:53,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:53,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666981362] [2022-02-11 01:13:53,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666981362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:53,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301493471] [2022-02-11 01:13:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:53,118 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) [2022-02-11 01:13:53,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:13:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:53,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301493471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:53,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:53,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 01:13:53,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265562131] [2022-02-11 01:13:53,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:53,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:13:53,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:13:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:13:53,289 INFO L87 Difference]: Start difference. First operand 2975 states and 10324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-02-11 01:13:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:53,576 INFO L93 Difference]: Finished difference Result 4784 states and 15583 transitions. [2022-02-11 01:13:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:13:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-02-11 01:13:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:53,586 INFO L225 Difference]: With dead ends: 4784 [2022-02-11 01:13:53,587 INFO L226 Difference]: Without dead ends: 4747 [2022-02-11 01:13:53,587 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:13:53,588 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:53,588 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:13:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-02-11 01:13:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3475. [2022-02-11 01:13:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3475 states, 3474 states have (on average 3.4905008635578585) internal successors, (12126), 3474 states have internal predecessors, (12126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 12126 transitions. [2022-02-11 01:13:53,663 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 12126 transitions. Word has length 27 [2022-02-11 01:13:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 3475 states and 12126 transitions. [2022-02-11 01:13:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-02-11 01:13:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 12126 transitions. [2022-02-11 01:13:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:53,669 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:53,669 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:53,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:53,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-11 01:13:53,870 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1380238831, now seen corresponding path program 8 times [2022-02-11 01:13:53,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:53,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640249662] [2022-02-11 01:13:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:53,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:53,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640249662] [2022-02-11 01:13:53,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640249662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:53,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266502545] [2022-02-11 01:13:53,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:53,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:53,935 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) [2022-02-11 01:13:53,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:13:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:53,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:54,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:54,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266502545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:54,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:54,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 01:13:54,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851802084] [2022-02-11 01:13:54,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:54,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:13:54,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:13:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:13:54,066 INFO L87 Difference]: Start difference. First operand 3475 states and 12126 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-02-11 01:13:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:54,255 INFO L93 Difference]: Finished difference Result 4950 states and 16086 transitions. [2022-02-11 01:13:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:13:54,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-02-11 01:13:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:54,264 INFO L225 Difference]: With dead ends: 4950 [2022-02-11 01:13:54,265 INFO L226 Difference]: Without dead ends: 4950 [2022-02-11 01:13:54,265 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:13:54,265 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:54,265 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-02-11 01:13:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3463. [2022-02-11 01:13:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 3.4803581744656267) internal successors, (12049), 3462 states have internal predecessors, (12049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 12049 transitions. [2022-02-11 01:13:54,359 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 12049 transitions. Word has length 27 [2022-02-11 01:13:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:54,359 INFO L470 AbstractCegarLoop]: Abstraction has 3463 states and 12049 transitions. [2022-02-11 01:13:54,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-02-11 01:13:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 12049 transitions. [2022-02-11 01:13:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:54,369 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:54,369 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:54,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-11 01:13:54,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-11 01:13:54,586 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1293927831, now seen corresponding path program 13 times [2022-02-11 01:13:54,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:54,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470926939] [2022-02-11 01:13:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:54,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:54,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470926939] [2022-02-11 01:13:54,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470926939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:54,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140534464] [2022-02-11 01:13:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:54,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:54,616 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) [2022-02-11 01:13:54,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:13:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:54,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:54,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140534464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:54,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:54,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:13:54,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459964370] [2022-02-11 01:13:54,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:54,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:54,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:54,865 INFO L87 Difference]: Start difference. First operand 3463 states and 12049 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:56,375 INFO L93 Difference]: Finished difference Result 13772 states and 44128 transitions. [2022-02-11 01:13:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:13:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:56,406 INFO L225 Difference]: With dead ends: 13772 [2022-02-11 01:13:56,406 INFO L226 Difference]: Without dead ends: 13772 [2022-02-11 01:13:56,408 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1770, Invalid=6602, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 01:13:56,408 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:56,408 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 267 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:13:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-02-11 01:13:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 4598. [2022-02-11 01:13:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.5729823798129217) internal successors, (16425), 4597 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16425 transitions. [2022-02-11 01:13:56,596 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16425 transitions. Word has length 27 [2022-02-11 01:13:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:56,597 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16425 transitions. [2022-02-11 01:13:56,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16425 transitions. [2022-02-11 01:13:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:56,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:56,604 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:56,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:56,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 01:13:56,807 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1100027163, now seen corresponding path program 14 times [2022-02-11 01:13:56,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:56,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762869956] [2022-02-11 01:13:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:56,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:56,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:56,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762869956] [2022-02-11 01:13:56,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762869956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:56,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729281971] [2022-02-11 01:13:56,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:56,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:56,861 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) [2022-02-11 01:13:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:13:56,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:56,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:13:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:57,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:57,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729281971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:57,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:57,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:13:57,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099160031] [2022-02-11 01:13:57,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:57,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:13:57,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:13:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:13:57,097 INFO L87 Difference]: Start difference. First operand 4598 states and 16425 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:58,191 INFO L93 Difference]: Finished difference Result 11895 states and 38033 transitions. [2022-02-11 01:13:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 01:13:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:13:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:58,217 INFO L225 Difference]: With dead ends: 11895 [2022-02-11 01:13:58,217 INFO L226 Difference]: Without dead ends: 11895 [2022-02-11 01:13:58,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:13:58,218 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 699 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:58,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 269 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2022-02-11 01:13:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 4597. [2022-02-11 01:13:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 3.571366405570061) internal successors, (16414), 4596 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 16414 transitions. [2022-02-11 01:13:58,430 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 16414 transitions. Word has length 27 [2022-02-11 01:13:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:58,430 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 16414 transitions. [2022-02-11 01:13:58,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 16414 transitions. [2022-02-11 01:13:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:58,438 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:58,438 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:58,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:58,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-02-11 01:13:58,651 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1526676838, now seen corresponding path program 15 times [2022-02-11 01:13:58,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:58,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609912277] [2022-02-11 01:13:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:58,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:58,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609912277] [2022-02-11 01:13:58,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609912277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:58,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114239935] [2022-02-11 01:13:58,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:58,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:58,699 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) [2022-02-11 01:13:58,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:13:58,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:13:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:58,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114239935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:58,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:58,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-02-11 01:13:58,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316477070] [2022-02-11 01:13:58,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:58,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:58,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:58,885 INFO L87 Difference]: Start difference. First operand 4597 states and 16414 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:13:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:59,042 INFO L93 Difference]: Finished difference Result 6491 states and 22125 transitions. [2022-02-11 01:13:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:13:59,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-02-11 01:13:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:59,056 INFO L225 Difference]: With dead ends: 6491 [2022-02-11 01:13:59,057 INFO L226 Difference]: Without dead ends: 6480 [2022-02-11 01:13:59,057 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-02-11 01:13:59,059 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:59,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-02-11 01:13:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 4687. [2022-02-11 01:13:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.5742637644046096) internal successors, (16749), 4686 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 16749 transitions. [2022-02-11 01:13:59,148 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 16749 transitions. Word has length 27 [2022-02-11 01:13:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:59,148 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 16749 transitions. [2022-02-11 01:13:59,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:13:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 16749 transitions. [2022-02-11 01:13:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:59,156 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:59,156 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:59,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-11 01:13:59,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:59,364 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:13:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1074696534, now seen corresponding path program 16 times [2022-02-11 01:13:59,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:59,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96875687] [2022-02-11 01:13:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:59,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:59,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96875687] [2022-02-11 01:13:59,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96875687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:59,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320584005] [2022-02-11 01:13:59,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:59,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:59,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:59,405 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) [2022-02-11 01:13:59,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:13:59,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:13:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:13:59,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:59,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320584005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:59,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:59,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-02-11 01:13:59,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191283952] [2022-02-11 01:13:59,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:59,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 01:13:59,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 01:13:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-11 01:13:59,621 INFO L87 Difference]: Start difference. First operand 4687 states and 16749 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:13:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:59,945 INFO L93 Difference]: Finished difference Result 7410 states and 24751 transitions. [2022-02-11 01:13:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 01:13:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-02-11 01:13:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:59,959 INFO L225 Difference]: With dead ends: 7410 [2022-02-11 01:13:59,959 INFO L226 Difference]: Without dead ends: 7410 [2022-02-11 01:13:59,960 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:13:59,960 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:59,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 156 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:13:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-02-11 01:14:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 4582. [2022-02-11 01:14:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.563632394673652) internal successors, (16325), 4581 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16325 transitions. [2022-02-11 01:14:00,104 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16325 transitions. Word has length 27 [2022-02-11 01:14:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:00,104 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 16325 transitions. [2022-02-11 01:14:00,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2022-02-11 01:14:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16325 transitions. [2022-02-11 01:14:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:00,111 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:00,111 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:00,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 01:14:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-11 01:14:00,327 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash 728117397, now seen corresponding path program 17 times [2022-02-11 01:14:00,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:00,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044339262] [2022-02-11 01:14:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:00,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:00,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044339262] [2022-02-11 01:14:00,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044339262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:00,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102687881] [2022-02-11 01:14:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:00,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:00,365 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) [2022-02-11 01:14:00,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:14:00,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:14:00,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:00,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:00,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102687881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:00,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:00,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-11 01:14:00,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997214583] [2022-02-11 01:14:00,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:00,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:14:00,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:14:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:14:00,535 INFO L87 Difference]: Start difference. First operand 4582 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:01,586 INFO L93 Difference]: Finished difference Result 12614 states and 40253 transitions. [2022-02-11 01:14:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:14:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:01,614 INFO L225 Difference]: With dead ends: 12614 [2022-02-11 01:14:01,614 INFO L226 Difference]: Without dead ends: 12614 [2022-02-11 01:14:01,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 01:14:01,616 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 549 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:01,616 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 215 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12614 states. [2022-02-11 01:14:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 4598. [2022-02-11 01:14:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.565151185555797) internal successors, (16389), 4597 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16389 transitions. [2022-02-11 01:14:01,765 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16389 transitions. Word has length 27 [2022-02-11 01:14:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:01,765 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16389 transitions. [2022-02-11 01:14:01,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16389 transitions. [2022-02-11 01:14:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:01,772 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:01,772 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:01,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:01,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:01,986 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash 538899099, now seen corresponding path program 18 times [2022-02-11 01:14:01,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:01,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161107719] [2022-02-11 01:14:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:02,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:02,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161107719] [2022-02-11 01:14:02,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161107719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:02,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243365769] [2022-02-11 01:14:02,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:02,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:02,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:02,025 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) [2022-02-11 01:14:02,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:14:02,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:14:02,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:02,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:02,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243365769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:02,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:02,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-11 01:14:02,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207882248] [2022-02-11 01:14:02,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:02,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 01:14:02,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 01:14:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-11 01:14:02,155 INFO L87 Difference]: Start difference. First operand 4598 states and 16389 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:02,873 INFO L93 Difference]: Finished difference Result 12094 states and 38855 transitions. [2022-02-11 01:14:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 01:14:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:02,898 INFO L225 Difference]: With dead ends: 12094 [2022-02-11 01:14:02,898 INFO L226 Difference]: Without dead ends: 12086 [2022-02-11 01:14:02,899 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=888, Invalid=3272, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:14:02,899 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 610 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:02,899 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 210 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:14:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-02-11 01:14:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4592. [2022-02-11 01:14:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-02-11 01:14:03,033 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-02-11 01:14:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:03,033 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-02-11 01:14:03,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-02-11 01:14:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:03,039 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:03,039 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:03,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:03,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:03,255 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1928420315, now seen corresponding path program 19 times [2022-02-11 01:14:03,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:03,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360103874] [2022-02-11 01:14:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:03,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:03,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360103874] [2022-02-11 01:14:03,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360103874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:03,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51592879] [2022-02-11 01:14:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:03,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:03,292 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) [2022-02-11 01:14:03,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 01:14:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:03,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:03,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51592879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:03,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:03,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:14:03,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818138221] [2022-02-11 01:14:03,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:14:03,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:14:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:14:03,501 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:04,607 INFO L93 Difference]: Finished difference Result 10329 states and 32586 transitions. [2022-02-11 01:14:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:14:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:04,630 INFO L225 Difference]: With dead ends: 10329 [2022-02-11 01:14:04,630 INFO L226 Difference]: Without dead ends: 10329 [2022-02-11 01:14:04,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1236, Invalid=3876, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:14:04,631 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 843 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:04,631 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 244 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2022-02-11 01:14:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 4598. [2022-02-11 01:14:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.563845986512943) internal successors, (16383), 4597 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16383 transitions. [2022-02-11 01:14:04,760 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16383 transitions. Word has length 27 [2022-02-11 01:14:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:04,760 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16383 transitions. [2022-02-11 01:14:04,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16383 transitions. [2022-02-11 01:14:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:04,767 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:04,767 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:04,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:04,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-11 01:14:04,983 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -583897511, now seen corresponding path program 20 times [2022-02-11 01:14:04,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:04,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669319513] [2022-02-11 01:14:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:05,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:05,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669319513] [2022-02-11 01:14:05,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669319513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:05,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452481482] [2022-02-11 01:14:05,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:05,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:05,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:05,017 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) [2022-02-11 01:14:05,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 01:14:05,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:05,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452481482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:05,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:05,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-11 01:14:05,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186447985] [2022-02-11 01:14:05,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 01:14:05,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 01:14:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 01:14:05,227 INFO L87 Difference]: Start difference. First operand 4598 states and 16383 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:06,459 INFO L93 Difference]: Finished difference Result 10595 states and 33851 transitions. [2022-02-11 01:14:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 01:14:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:06,483 INFO L225 Difference]: With dead ends: 10595 [2022-02-11 01:14:06,484 INFO L226 Difference]: Without dead ends: 10587 [2022-02-11 01:14:06,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1514, Invalid=5968, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 01:14:06,484 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 743 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:06,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 262 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-02-11 01:14:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 4592. [2022-02-11 01:14:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-02-11 01:14:06,615 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-02-11 01:14:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:06,615 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-02-11 01:14:06,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-02-11 01:14:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:06,622 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:06,622 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:06,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-11 01:14:06,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-11 01:14:06,835 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1207160328, now seen corresponding path program 21 times [2022-02-11 01:14:06,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:06,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127608794] [2022-02-11 01:14:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:06,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:06,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:06,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127608794] [2022-02-11 01:14:06,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127608794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:06,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542414967] [2022-02-11 01:14:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:06,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:06,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:06,866 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) [2022-02-11 01:14:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 01:14:06,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:14:06,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:06,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:14:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:06,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:06,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542414967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:06,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:06,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 01:14:06,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008873722] [2022-02-11 01:14:06,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:06,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:14:06,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:14:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:14:06,992 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2022-02-11 01:14:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:07,225 INFO L93 Difference]: Finished difference Result 7411 states and 24660 transitions. [2022-02-11 01:14:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:14:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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 27 [2022-02-11 01:14:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:07,244 INFO L225 Difference]: With dead ends: 7411 [2022-02-11 01:14:07,244 INFO L226 Difference]: Without dead ends: 7411 [2022-02-11 01:14:07,245 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:14:07,245 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:07,245 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 167 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:14:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-02-11 01:14:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5288. [2022-02-11 01:14:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 3.5496500851144317) internal successors, (18767), 5287 states have internal predecessors, (18767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 18767 transitions. [2022-02-11 01:14:07,378 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 18767 transitions. Word has length 27 [2022-02-11 01:14:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:07,378 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 18767 transitions. [2022-02-11 01:14:07,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2022-02-11 01:14:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 18767 transitions. [2022-02-11 01:14:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:07,387 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:07,387 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:07,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-11 01:14:07,597 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 459370969, now seen corresponding path program 22 times [2022-02-11 01:14:07,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:07,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094178671] [2022-02-11 01:14:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:07,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:07,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094178671] [2022-02-11 01:14:07,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094178671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:07,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213742091] [2022-02-11 01:14:07,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:07,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:07,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:07,628 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) [2022-02-11 01:14:07,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 01:14:07,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:07,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:07,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213742091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:07,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:07,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:14:07,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161854491] [2022-02-11 01:14:07,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:07,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:14:07,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:14:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:14:07,797 INFO L87 Difference]: Start difference. First operand 5288 states and 18767 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:08,482 INFO L93 Difference]: Finished difference Result 12338 states and 40499 transitions. [2022-02-11 01:14:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:14:08,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-02-11 01:14:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:08,509 INFO L225 Difference]: With dead ends: 12338 [2022-02-11 01:14:08,509 INFO L226 Difference]: Without dead ends: 12338 [2022-02-11 01:14:08,510 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:14:08,511 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 484 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:08,511 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 160 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:14:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-02-11 01:14:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 6120. [2022-02-11 01:14:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.566268998202321) internal successors, (21822), 6119 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 21822 transitions. [2022-02-11 01:14:08,679 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 21822 transitions. Word has length 27 [2022-02-11 01:14:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:08,680 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 21822 transitions. [2022-02-11 01:14:08,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 21822 transitions. [2022-02-11 01:14:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:08,688 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:08,688 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:08,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:08,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 01:14:08,903 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash 270152671, now seen corresponding path program 23 times [2022-02-11 01:14:08,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:08,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811882681] [2022-02-11 01:14:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:08,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:08,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811882681] [2022-02-11 01:14:08,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811882681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:08,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818722477] [2022-02-11 01:14:08,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:08,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:08,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:08,952 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) [2022-02-11 01:14:08,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:14:08,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:08,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 01:14:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:09,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:09,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818722477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:09,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:09,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:14:09,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604522525] [2022-02-11 01:14:09,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:09,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:14:09,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:14:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:14:09,128 INFO L87 Difference]: Start difference. First operand 6120 states and 21822 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:09,758 INFO L93 Difference]: Finished difference Result 11967 states and 39549 transitions. [2022-02-11 01:14:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 01:14:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-02-11 01:14:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:09,781 INFO L225 Difference]: With dead ends: 11967 [2022-02-11 01:14:09,781 INFO L226 Difference]: Without dead ends: 11959 [2022-02-11 01:14:09,781 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:14:09,781 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 479 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:09,781 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 165 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:14:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2022-02-11 01:14:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 6112. [2022-02-11 01:14:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.5660284732449683) internal successors, (21792), 6111 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21792 transitions. [2022-02-11 01:14:09,928 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21792 transitions. Word has length 27 [2022-02-11 01:14:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 21792 transitions. [2022-02-11 01:14:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21792 transitions. [2022-02-11 01:14:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:09,936 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:09,936 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:09,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-11 01:14:10,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 01:14:10,141 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -941485803, now seen corresponding path program 9 times [2022-02-11 01:14:10,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:10,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546946056] [2022-02-11 01:14:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:10,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:10,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546946056] [2022-02-11 01:14:10,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546946056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:10,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731636728] [2022-02-11 01:14:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:10,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:10,179 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) [2022-02-11 01:14:10,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 01:14:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:14:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:14:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:10,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:10,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731636728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:10,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:10,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-02-11 01:14:10,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024366213] [2022-02-11 01:14:10,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:14:10,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:14:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:14:10,321 INFO L87 Difference]: Start difference. First operand 6112 states and 21792 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-02-11 01:14:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:10,547 INFO L93 Difference]: Finished difference Result 7455 states and 25610 transitions. [2022-02-11 01:14:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 01:14:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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 27 [2022-02-11 01:14:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:10,561 INFO L225 Difference]: With dead ends: 7455 [2022-02-11 01:14:10,561 INFO L226 Difference]: Without dead ends: 7455 [2022-02-11 01:14:10,562 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:14:10,562 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:10,562 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 102 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 01:14:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-02-11 01:14:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6153. [2022-02-11 01:14:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 3.5640442132639794) internal successors, (21926), 6152 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21926 transitions. [2022-02-11 01:14:10,729 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21926 transitions. Word has length 27 [2022-02-11 01:14:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:10,730 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 21926 transitions. [2022-02-11 01:14:10,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-02-11 01:14:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21926 transitions. [2022-02-11 01:14:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:10,740 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:10,740 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:10,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:10,960 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 913534931, now seen corresponding path program 24 times [2022-02-11 01:14:10,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:10,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617160703] [2022-02-11 01:14:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:10,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:10,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617160703] [2022-02-11 01:14:10,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617160703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:10,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186105592] [2022-02-11 01:14:10,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:10,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:10,990 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) [2022-02-11 01:14:10,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 01:14:11,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:14:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:11,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186105592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:11,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:11,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-11 01:14:11,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458064849] [2022-02-11 01:14:11,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:11,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:14:11,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:11,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:14:11,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:14:11,118 INFO L87 Difference]: Start difference. First operand 6153 states and 21926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:11,605 INFO L93 Difference]: Finished difference Result 11867 states and 39346 transitions. [2022-02-11 01:14:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:14:11,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-02-11 01:14:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:11,630 INFO L225 Difference]: With dead ends: 11867 [2022-02-11 01:14:11,630 INFO L226 Difference]: Without dead ends: 11835 [2022-02-11 01:14:11,634 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:14:11,637 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 553 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:11,638 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 120 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-02-11 01:14:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6181. [2022-02-11 01:14:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 3.5611650485436894) internal successors, (22008), 6180 states have internal predecessors, (22008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 22008 transitions. [2022-02-11 01:14:11,821 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 22008 transitions. Word has length 27 [2022-02-11 01:14:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:11,821 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 22008 transitions. [2022-02-11 01:14:11,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2022-02-11 01:14:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 22008 transitions. [2022-02-11 01:14:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:11,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:11,830 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:11,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:12,043 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1225890903, now seen corresponding path program 25 times [2022-02-11 01:14:12,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:12,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471833999] [2022-02-11 01:14:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:12,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:12,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471833999] [2022-02-11 01:14:12,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471833999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:12,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171473795] [2022-02-11 01:14:12,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:12,079 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) [2022-02-11 01:14:12,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 01:14:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:12,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:12,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171473795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:12,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:12,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:14:12,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725137359] [2022-02-11 01:14:12,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:12,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:14:12,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:14:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:14:12,307 INFO L87 Difference]: Start difference. First operand 6181 states and 22008 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:13,733 INFO L93 Difference]: Finished difference Result 11509 states and 36905 transitions. [2022-02-11 01:14:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-11 01:14:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:13,756 INFO L225 Difference]: With dead ends: 11509 [2022-02-11 01:14:13,756 INFO L226 Difference]: Without dead ends: 11509 [2022-02-11 01:14:13,757 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1502, Invalid=5808, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 01:14:13,757 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 779 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:13,757 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 343 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2022-02-11 01:14:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6427. [2022-02-11 01:14:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.541083099906629) internal successors, (22755), 6426 states have internal predecessors, (22755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 22755 transitions. [2022-02-11 01:14:13,914 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 22755 transitions. Word has length 27 [2022-02-11 01:14:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:13,914 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 22755 transitions. [2022-02-11 01:14:13,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 22755 transitions. [2022-02-11 01:14:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:13,922 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:13,923 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:13,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:14,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:14,138 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1286426923, now seen corresponding path program 26 times [2022-02-11 01:14:14,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:14,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12088848] [2022-02-11 01:14:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:14,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:14,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:14,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12088848] [2022-02-11 01:14:14,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12088848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:14,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120129708] [2022-02-11 01:14:14,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:14,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:14,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:14,172 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) [2022-02-11 01:14:14,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 01:14:14,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:14,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:14,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120129708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:14,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:14,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 01:14:14,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676128318] [2022-02-11 01:14:14,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:14,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:14:14,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:14:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:14:14,347 INFO L87 Difference]: Start difference. First operand 6427 states and 22755 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:15,689 INFO L93 Difference]: Finished difference Result 11437 states and 37488 transitions. [2022-02-11 01:14:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-11 01:14:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:14:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:15,710 INFO L225 Difference]: With dead ends: 11437 [2022-02-11 01:14:15,711 INFO L226 Difference]: Without dead ends: 11429 [2022-02-11 01:14:15,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1456, Invalid=6200, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 01:14:15,711 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 789 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:15,712 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 241 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2022-02-11 01:14:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 6417. [2022-02-11 01:14:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6416 states have (on average 3.5395885286783044) internal successors, (22710), 6416 states have internal predecessors, (22710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 22710 transitions. [2022-02-11 01:14:15,858 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 22710 transitions. Word has length 27 [2022-02-11 01:14:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:15,858 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 22710 transitions. [2022-02-11 01:14:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 22710 transitions. [2022-02-11 01:14:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:15,867 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:15,867 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:15,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-11 01:14:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:16,083 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2131398375, now seen corresponding path program 27 times [2022-02-11 01:14:16,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:16,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589487358] [2022-02-11 01:14:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:16,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:16,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589487358] [2022-02-11 01:14:16,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589487358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:16,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522159035] [2022-02-11 01:14:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:16,143 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) [2022-02-11 01:14:16,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 01:14:16,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:14:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:16,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:16,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522159035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:16,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:16,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:14:16,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427421239] [2022-02-11 01:14:16,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:16,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:14:16,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:14:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:14:16,338 INFO L87 Difference]: Start difference. First operand 6417 states and 22710 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:14:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:17,404 INFO L93 Difference]: Finished difference Result 10978 states and 36562 transitions. [2022-02-11 01:14:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:14:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-02-11 01:14:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:17,428 INFO L225 Difference]: With dead ends: 10978 [2022-02-11 01:14:17,428 INFO L226 Difference]: Without dead ends: 10946 [2022-02-11 01:14:17,429 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=932, Invalid=3624, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:14:17,429 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:17,429 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 210 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-02-11 01:14:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 6457. [2022-02-11 01:14:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6457 states, 6456 states have (on average 3.5353159851301115) internal successors, (22824), 6456 states have internal predecessors, (22824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 22824 transitions. [2022-02-11 01:14:17,606 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 22824 transitions. Word has length 27 [2022-02-11 01:14:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:17,607 INFO L470 AbstractCegarLoop]: Abstraction has 6457 states and 22824 transitions. [2022-02-11 01:14:17,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:14:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 22824 transitions. [2022-02-11 01:14:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:17,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:17,616 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:17,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:17,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 01:14:17,832 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1828165507, now seen corresponding path program 28 times [2022-02-11 01:14:17,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:17,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563164522] [2022-02-11 01:14:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:17,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:17,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563164522] [2022-02-11 01:14:17,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563164522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:17,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925735339] [2022-02-11 01:14:17,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:17,867 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) [2022-02-11 01:14:17,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 01:14:17,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:17,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:18,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925735339] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:18,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:18,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 01:14:18,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370781686] [2022-02-11 01:14:18,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:18,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:14:18,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:14:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:14:18,009 INFO L87 Difference]: Start difference. First operand 6457 states and 22824 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:14:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:18,511 INFO L93 Difference]: Finished difference Result 9242 states and 30901 transitions. [2022-02-11 01:14:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:14:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-02-11 01:14:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:18,532 INFO L225 Difference]: With dead ends: 9242 [2022-02-11 01:14:18,532 INFO L226 Difference]: Without dead ends: 9242 [2022-02-11 01:14:18,533 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:14:18,533 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 310 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:18,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 196 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-02-11 01:14:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 6587. [2022-02-11 01:14:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 3.5252049802611602) internal successors, (23217), 6586 states have internal predecessors, (23217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 23217 transitions. [2022-02-11 01:14:18,680 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 23217 transitions. Word has length 27 [2022-02-11 01:14:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 6587 states and 23217 transitions. [2022-02-11 01:14:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-02-11 01:14:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 23217 transitions. [2022-02-11 01:14:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:18,692 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:18,692 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:18,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-11 01:14:18,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 01:14:18,893 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1881628206, now seen corresponding path program 18 times [2022-02-11 01:14:18,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:18,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924351316] [2022-02-11 01:14:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:18,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:18,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924351316] [2022-02-11 01:14:18,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924351316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:18,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341297790] [2022-02-11 01:14:18,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:18,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:18,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:18,941 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:18,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 01:14:18,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:14:18,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:19,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:19,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341297790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:19,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:19,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:14:19,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445116240] [2022-02-11 01:14:19,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:19,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:14:19,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:14:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:14:19,121 INFO L87 Difference]: Start difference. First operand 6587 states and 23217 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-02-11 01:14:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:19,606 INFO L93 Difference]: Finished difference Result 11132 states and 37515 transitions. [2022-02-11 01:14:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:14:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-02-11 01:14:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:19,628 INFO L225 Difference]: With dead ends: 11132 [2022-02-11 01:14:19,628 INFO L226 Difference]: Without dead ends: 11132 [2022-02-11 01:14:19,628 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:14:19,635 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:19,635 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 131 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-02-11 01:14:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 6717. [2022-02-11 01:14:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.5132519356759975) internal successors, (23595), 6716 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 23595 transitions. [2022-02-11 01:14:19,785 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 23595 transitions. Word has length 27 [2022-02-11 01:14:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:19,785 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 23595 transitions. [2022-02-11 01:14:19,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-02-11 01:14:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 23595 transitions. [2022-02-11 01:14:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:19,794 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:19,794 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:19,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:20,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 01:14:20,009 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2088141458, now seen corresponding path program 19 times [2022-02-11 01:14:20,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:20,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310501857] [2022-02-11 01:14:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:20,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310501857] [2022-02-11 01:14:20,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310501857] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916499527] [2022-02-11 01:14:20,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:20,085 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:20,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 01:14:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:20,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:20,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916499527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:20,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:20,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-11 01:14:20,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396205682] [2022-02-11 01:14:20,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:20,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 01:14:20,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 01:14:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-11 01:14:20,259 INFO L87 Difference]: Start difference. First operand 6717 states and 23595 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-11 01:14:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:20,560 INFO L93 Difference]: Finished difference Result 9155 states and 31004 transitions. [2022-02-11 01:14:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:14:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 27 [2022-02-11 01:14:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:20,580 INFO L225 Difference]: With dead ends: 9155 [2022-02-11 01:14:20,580 INFO L226 Difference]: Without dead ends: 9145 [2022-02-11 01:14:20,580 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:14:20,581 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:20,581 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 254 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-02-11 01:14:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 6962. [2022-02-11 01:14:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.5207585117080877) internal successors, (24508), 6961 states have internal predecessors, (24508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 24508 transitions. [2022-02-11 01:14:20,741 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 24508 transitions. Word has length 27 [2022-02-11 01:14:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:20,741 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 24508 transitions. [2022-02-11 01:14:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-11 01:14:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 24508 transitions. [2022-02-11 01:14:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:20,753 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:20,753 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:20,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:20,972 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1818737390, now seen corresponding path program 20 times [2022-02-11 01:14:20,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:20,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259087224] [2022-02-11 01:14:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:20,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:21,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:21,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259087224] [2022-02-11 01:14:21,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259087224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:21,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167261556] [2022-02-11 01:14:21,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:21,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:21,022 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 01:14:21,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 01:14:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:21,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:21,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167261556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:21,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:21,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-11 01:14:21,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786426497] [2022-02-11 01:14:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:21,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 01:14:21,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 01:14:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-11 01:14:21,162 INFO L87 Difference]: Start difference. First operand 6962 states and 24508 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-02-11 01:14:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:21,604 INFO L93 Difference]: Finished difference Result 11751 states and 39739 transitions. [2022-02-11 01:14:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:14:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-02-11 01:14:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:21,631 INFO L225 Difference]: With dead ends: 11751 [2022-02-11 01:14:21,632 INFO L226 Difference]: Without dead ends: 11735 [2022-02-11 01:14:21,632 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:14:21,632 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:21,632 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 137 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-02-11 01:14:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 7106. [2022-02-11 01:14:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7105 states have (on average 3.5073891625615765) internal successors, (24920), 7105 states have internal predecessors, (24920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 24920 transitions. [2022-02-11 01:14:21,821 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 24920 transitions. Word has length 27 [2022-02-11 01:14:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:21,821 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 24920 transitions. [2022-02-11 01:14:21,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-02-11 01:14:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 24920 transitions. [2022-02-11 01:14:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:21,831 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:21,831 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:21,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:22,035 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1104222989, now seen corresponding path program 10 times [2022-02-11 01:14:22,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:22,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191016136] [2022-02-11 01:14:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:22,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:22,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191016136] [2022-02-11 01:14:22,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191016136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:22,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124253934] [2022-02-11 01:14:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:22,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:22,075 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:22,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 01:14:22,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:22,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:14:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:22,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:22,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124253934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:22,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:22,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 01:14:22,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434239736] [2022-02-11 01:14:22,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:22,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 01:14:22,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 01:14:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-02-11 01:14:22,245 INFO L87 Difference]: Start difference. First operand 7106 states and 24920 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2022-02-11 01:14:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:22,602 INFO L93 Difference]: Finished difference Result 8555 states and 28945 transitions. [2022-02-11 01:14:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 01:14:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2022-02-11 01:14:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:22,619 INFO L225 Difference]: With dead ends: 8555 [2022-02-11 01:14:22,619 INFO L226 Difference]: Without dead ends: 8555 [2022-02-11 01:14:22,619 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:14:22,620 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:22,620 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 111 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-02-11 01:14:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 7022. [2022-02-11 01:14:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 3.5060532687651333) internal successors, (24616), 7021 states have internal predecessors, (24616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 24616 transitions. [2022-02-11 01:14:22,749 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 24616 transitions. Word has length 27 [2022-02-11 01:14:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:22,749 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 24616 transitions. [2022-02-11 01:14:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2022-02-11 01:14:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 24616 transitions. [2022-02-11 01:14:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:14:22,760 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:22,760 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:22,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 01:14:22,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 01:14:22,961 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1885222371, now seen corresponding path program 29 times [2022-02-11 01:14:22,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:22,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108437776] [2022-02-11 01:14:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:23,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:23,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108437776] [2022-02-11 01:14:23,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108437776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:23,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103593131] [2022-02-11 01:14:23,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:23,123 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:23,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 01:14:23,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:14:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:23,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:14:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:23,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 01:14:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:23,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:23,554 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:14:23,554 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 21 treesize of output 46 [2022-02-11 01:14:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:23,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:23,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-02-11 01:14:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:23,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103593131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:23,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:23,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-02-11 01:14:23,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380778174] [2022-02-11 01:14:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:23,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 01:14:23,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 01:14:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:14:23,658 INFO L87 Difference]: Start difference. First operand 7022 states and 24616 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) [2022-02-11 01:14:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:23,919 INFO L93 Difference]: Finished difference Result 7838 states and 27083 transitions. [2022-02-11 01:14:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 01:14:23,919 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 30 [2022-02-11 01:14:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:23,937 INFO L225 Difference]: With dead ends: 7838 [2022-02-11 01:14:23,937 INFO L226 Difference]: Without dead ends: 7769 [2022-02-11 01:14:23,937 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-11 01:14:23,937 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:23,938 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 371 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:14:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7769 states. [2022-02-11 01:14:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7769 to 7214. [2022-02-11 01:14:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7214 states, 7213 states have (on average 3.501178427838625) internal successors, (25254), 7213 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 25254 transitions. [2022-02-11 01:14:24,073 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 25254 transitions. Word has length 30 [2022-02-11 01:14:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:24,073 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 25254 transitions. [2022-02-11 01:14:24,074 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) [2022-02-11 01:14:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 25254 transitions. [2022-02-11 01:14:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:14:24,087 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:24,087 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:24,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:24,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:24,305 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -428025768, now seen corresponding path program 11 times [2022-02-11 01:14:24,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:24,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779762873] [2022-02-11 01:14:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:24,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:24,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779762873] [2022-02-11 01:14:24,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779762873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:24,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789789709] [2022-02-11 01:14:24,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:24,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:24,616 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 01:14:24,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:14:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:14:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:25,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:25,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:25,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 01:14:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:25,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:25,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:25,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:25,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:14:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:25,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:25,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-02-11 01:14:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:25,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789789709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:25,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:25,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-11 01:14:25,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219914818] [2022-02-11 01:14:25,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:14:25,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:14:25,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:14:25,723 INFO L87 Difference]: Start difference. First operand 7214 states and 25254 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:33,146 INFO L93 Difference]: Finished difference Result 12273 states and 38840 transitions. [2022-02-11 01:14:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 01:14:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:14:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:33,171 INFO L225 Difference]: With dead ends: 12273 [2022-02-11 01:14:33,172 INFO L226 Difference]: Without dead ends: 12228 [2022-02-11 01:14:33,172 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2071, Invalid=13181, Unknown=0, NotChecked=0, Total=15252 [2022-02-11 01:14:33,172 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 824 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:33,172 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 767 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 01:14:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12228 states. [2022-02-11 01:14:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12228 to 7230. [2022-02-11 01:14:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.5000691658597316) internal successors, (25302), 7229 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25302 transitions. [2022-02-11 01:14:33,335 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25302 transitions. Word has length 30 [2022-02-11 01:14:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25302 transitions. [2022-02-11 01:14:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25302 transitions. [2022-02-11 01:14:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:14:33,346 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:33,347 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:33,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 01:14:33,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:33,551 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash 999153544, now seen corresponding path program 12 times [2022-02-11 01:14:33,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:33,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919885313] [2022-02-11 01:14:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:33,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919885313] [2022-02-11 01:14:33,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919885313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395131347] [2022-02-11 01:14:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:33,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:33,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:33,847 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:33,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 01:14:33,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:14:33,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:14:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:34,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:34,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-02-11 01:14:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:34,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:34,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:34,719 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 19 treesize of output 46 [2022-02-11 01:14:34,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:34,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-11 01:14:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:34,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395131347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:34,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:34,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-11 01:14:34,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352383908] [2022-02-11 01:14:34,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:14:34,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:14:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:14:34,827 INFO L87 Difference]: Start difference. First operand 7230 states and 25302 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:56,129 INFO L93 Difference]: Finished difference Result 14121 states and 45782 transitions. [2022-02-11 01:14:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-02-11 01:14:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:14:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:56,162 INFO L225 Difference]: With dead ends: 14121 [2022-02-11 01:14:56,163 INFO L226 Difference]: Without dead ends: 14080 [2022-02-11 01:14:56,165 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27018 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=6199, Invalid=61141, Unknown=0, NotChecked=0, Total=67340 [2022-02-11 01:14:56,165 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 1291 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 6104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 5543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:56,165 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1092 Invalid, 6104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 5543 Invalid, 0 Unknown, 172 Unchecked, 2.9s Time] [2022-02-11 01:14:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2022-02-11 01:14:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 7421. [2022-02-11 01:14:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 3.494070080862534) internal successors, (25926), 7420 states have internal predecessors, (25926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 25926 transitions. [2022-02-11 01:14:56,346 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 25926 transitions. Word has length 30 [2022-02-11 01:14:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:56,346 INFO L470 AbstractCegarLoop]: Abstraction has 7421 states and 25926 transitions. [2022-02-11 01:14:56,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 25926 transitions. [2022-02-11 01:14:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:14:56,358 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:56,358 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:56,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:56,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-02-11 01:14:56,581 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:14:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1036021596, now seen corresponding path program 13 times [2022-02-11 01:14:56,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:56,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420698983] [2022-02-11 01:14:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:56,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:56,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:56,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420698983] [2022-02-11 01:14:56,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420698983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:56,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845040622] [2022-02-11 01:14:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:56,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:56,878 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:56,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 01:14:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:14:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:57,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:57,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 01:14:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:57,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:57,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:57,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:14:57,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:57,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:57,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:57,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-02-11 01:14:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:57,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845040622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:57,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:57,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-02-11 01:14:57,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274995739] [2022-02-11 01:14:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:57,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:14:57,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:14:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:14:57,927 INFO L87 Difference]: Start difference. First operand 7421 states and 25926 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:03,354 INFO L93 Difference]: Finished difference Result 12007 states and 38257 transitions. [2022-02-11 01:15:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 01:15:03,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:03,412 INFO L225 Difference]: With dead ends: 12007 [2022-02-11 01:15:03,412 INFO L226 Difference]: Without dead ends: 12004 [2022-02-11 01:15:03,413 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1850, Invalid=11260, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 01:15:03,414 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 793 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:03,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 561 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:15:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2022-02-11 01:15:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 7411. [2022-02-11 01:15:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.494871794871795) internal successors, (25897), 7410 states have internal predecessors, (25897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25897 transitions. [2022-02-11 01:15:03,559 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25897 transitions. Word has length 30 [2022-02-11 01:15:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:03,559 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 25897 transitions. [2022-02-11 01:15:03,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25897 transitions. [2022-02-11 01:15:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:03,570 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:03,570 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:03,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:03,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:03,776 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1895398836, now seen corresponding path program 14 times [2022-02-11 01:15:03,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:03,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754376339] [2022-02-11 01:15:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:03,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:03,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754376339] [2022-02-11 01:15:03,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754376339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:03,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51096972] [2022-02-11 01:15:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:15:03,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:03,965 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:03,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:15:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:15:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:15:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:04,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:04,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-11 01:15:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:04,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:04,750 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:15:04,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:15:04,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:04,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:04,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-11 01:15:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:05,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51096972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:05,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:05,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-11 01:15:05,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218559713] [2022-02-11 01:15:05,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:15:05,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:15:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:15:05,086 INFO L87 Difference]: Start difference. First operand 7411 states and 25897 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:11,596 INFO L93 Difference]: Finished difference Result 12598 states and 40741 transitions. [2022-02-11 01:15:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 01:15:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:11,628 INFO L225 Difference]: With dead ends: 12598 [2022-02-11 01:15:11,629 INFO L226 Difference]: Without dead ends: 12439 [2022-02-11 01:15:11,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1366, Invalid=11516, Unknown=0, NotChecked=0, Total=12882 [2022-02-11 01:15:11,630 INFO L934 BasicCegarLoop]: 72 mSDtfsCounter, 677 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:11,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 876 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3011 Invalid, 0 Unknown, 616 Unchecked, 1.6s Time] [2022-02-11 01:15:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2022-02-11 01:15:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 7481. [2022-02-11 01:15:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 7480 states have (on average 3.4958556149732622) internal successors, (26149), 7480 states have internal predecessors, (26149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 26149 transitions. [2022-02-11 01:15:11,835 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 26149 transitions. Word has length 30 [2022-02-11 01:15:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:11,835 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 26149 transitions. [2022-02-11 01:15:11,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 26149 transitions. [2022-02-11 01:15:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:11,848 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:11,848 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:11,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:12,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-11 01:15:12,049 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:12,049 INFO L85 PathProgramCache]: Analyzing trace with hash 491925475, now seen corresponding path program 21 times [2022-02-11 01:15:12,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:12,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297388993] [2022-02-11 01:15:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:12,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:12,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:12,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297388993] [2022-02-11 01:15:12,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297388993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:12,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670515341] [2022-02-11 01:15:12,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:15:12,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:12,474 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:12,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:15:12,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:15:12,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:12,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:15:12,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:12,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 15 [2022-02-11 01:15:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:12,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:13,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:13,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:13,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:13,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-02-11 01:15:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:13,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:15:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:13,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670515341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:13,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:13,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-02-11 01:15:13,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615500106] [2022-02-11 01:15:13,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:13,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:15:13,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:15:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:15:13,274 INFO L87 Difference]: Start difference. First operand 7481 states and 26149 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:21,698 INFO L93 Difference]: Finished difference Result 12701 states and 41359 transitions. [2022-02-11 01:15:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-11 01:15:21,698 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:21,734 INFO L225 Difference]: With dead ends: 12701 [2022-02-11 01:15:21,734 INFO L226 Difference]: Without dead ends: 12654 [2022-02-11 01:15:21,736 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2795, Invalid=23611, Unknown=0, NotChecked=0, Total=26406 [2022-02-11 01:15:21,736 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 972 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 4553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:21,737 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1095 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 01:15:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12654 states. [2022-02-11 01:15:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12654 to 7785. [2022-02-11 01:15:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 3.4771325796505654) internal successors, (27066), 7784 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 27066 transitions. [2022-02-11 01:15:21,923 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 27066 transitions. Word has length 30 [2022-02-11 01:15:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:21,923 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 27066 transitions. [2022-02-11 01:15:21,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 27066 transitions. [2022-02-11 01:15:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:21,936 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:21,936 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:21,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-11 01:15:22,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-11 01:15:22,152 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2120239378, now seen corresponding path program 15 times [2022-02-11 01:15:22,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:22,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243096832] [2022-02-11 01:15:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:22,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:22,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243096832] [2022-02-11 01:15:22,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243096832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:22,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836451951] [2022-02-11 01:15:22,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:15:22,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:22,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:22,443 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:22,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:15:22,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:15:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:15:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:22,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:22,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 01:15:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:22,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:23,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:23,339 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 35 treesize of output 68 [2022-02-11 01:15:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:23,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836451951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:23,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:23,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-02-11 01:15:23,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375720309] [2022-02-11 01:15:23,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:23,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:15:23,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:15:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:15:23,855 INFO L87 Difference]: Start difference. First operand 7785 states and 27066 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:27,850 INFO L93 Difference]: Finished difference Result 12241 states and 39290 transitions. [2022-02-11 01:15:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 01:15:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:27,875 INFO L225 Difference]: With dead ends: 12241 [2022-02-11 01:15:27,875 INFO L226 Difference]: Without dead ends: 12223 [2022-02-11 01:15:27,876 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1561, Invalid=9151, Unknown=0, NotChecked=0, Total=10712 [2022-02-11 01:15:27,876 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 592 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 967 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:27,876 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 453 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1085 Invalid, 0 Unknown, 967 Unchecked, 0.6s Time] [2022-02-11 01:15:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12223 states. [2022-02-11 01:15:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12223 to 7791. [2022-02-11 01:15:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.477535301668806) internal successors, (27090), 7790 states have internal predecessors, (27090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 27090 transitions. [2022-02-11 01:15:28,049 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 27090 transitions. Word has length 30 [2022-02-11 01:15:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:28,050 INFO L470 AbstractCegarLoop]: Abstraction has 7791 states and 27090 transitions. [2022-02-11 01:15:28,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 27090 transitions. [2022-02-11 01:15:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:28,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:28,062 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:28,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:28,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:28,278 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash 680823678, now seen corresponding path program 16 times [2022-02-11 01:15:28,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:28,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906820937] [2022-02-11 01:15:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:28,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:28,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906820937] [2022-02-11 01:15:28,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906820937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:28,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966122635] [2022-02-11 01:15:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:28,596 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:28,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 01:15:28,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:15:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:15:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:28,921 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 26 treesize of output 18 [2022-02-11 01:15:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:29,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:29,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:15:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:29,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:29,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:29,423 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 20 treesize of output 47 [2022-02-11 01:15:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:29,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966122635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:29,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:29,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-02-11 01:15:29,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109172799] [2022-02-11 01:15:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:29,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:15:29,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:15:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:15:29,604 INFO L87 Difference]: Start difference. First operand 7791 states and 27090 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:35,839 INFO L93 Difference]: Finished difference Result 13671 states and 42804 transitions. [2022-02-11 01:15:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-11 01:15:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:35,869 INFO L225 Difference]: With dead ends: 13671 [2022-02-11 01:15:35,869 INFO L226 Difference]: Without dead ends: 13626 [2022-02-11 01:15:35,870 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6376 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2443, Invalid=14327, Unknown=0, NotChecked=0, Total=16770 [2022-02-11 01:15:35,870 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 1008 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:35,870 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 700 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2356 Invalid, 0 Unknown, 197 Unchecked, 1.2s Time] [2022-02-11 01:15:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2022-02-11 01:15:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 7812. [2022-02-11 01:15:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 7811 states have (on average 3.4771476123415694) internal successors, (27160), 7811 states have internal predecessors, (27160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 27160 transitions. [2022-02-11 01:15:36,073 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 27160 transitions. Word has length 30 [2022-02-11 01:15:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:36,073 INFO L470 AbstractCegarLoop]: Abstraction has 7812 states and 27160 transitions. [2022-02-11 01:15:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 27160 transitions. [2022-02-11 01:15:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:36,086 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:36,086 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:36,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-11 01:15:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:36,288 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 550383676, now seen corresponding path program 17 times [2022-02-11 01:15:36,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:36,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210950679] [2022-02-11 01:15:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:36,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:36,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210950679] [2022-02-11 01:15:36,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210950679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:36,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439000092] [2022-02-11 01:15:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:15:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:36,644 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:36,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 01:15:36,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:15:36,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:36,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:15:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:36,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:36,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:36,896 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 19 treesize of output 11 [2022-02-11 01:15:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:36,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:37,151 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:15:37,151 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 19 treesize of output 54 [2022-02-11 01:15:37,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:37,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:37,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:37,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-02-11 01:15:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:37,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439000092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:37,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:37,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 01:15:37,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17555767] [2022-02-11 01:15:37,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:15:37,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:15:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:15:37,401 INFO L87 Difference]: Start difference. First operand 7812 states and 27160 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:42,710 INFO L93 Difference]: Finished difference Result 12966 states and 41867 transitions. [2022-02-11 01:15:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-11 01:15:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:42,739 INFO L225 Difference]: With dead ends: 12966 [2022-02-11 01:15:42,739 INFO L226 Difference]: Without dead ends: 12921 [2022-02-11 01:15:42,740 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4117 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1195, Invalid=11015, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:15:42,740 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 574 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:42,741 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 799 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 01:15:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2022-02-11 01:15:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 7830. [2022-02-11 01:15:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 7829 states have (on average 3.4775833439775194) internal successors, (27226), 7829 states have internal predecessors, (27226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 27226 transitions. [2022-02-11 01:15:42,919 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 27226 transitions. Word has length 30 [2022-02-11 01:15:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:42,919 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 27226 transitions. [2022-02-11 01:15:42,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 27226 transitions. [2022-02-11 01:15:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:42,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:42,932 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:42,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-11 01:15:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-11 01:15:43,138 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -168495444, now seen corresponding path program 18 times [2022-02-11 01:15:43,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:43,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256989104] [2022-02-11 01:15:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:43,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:43,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:43,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256989104] [2022-02-11 01:15:43,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256989104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:43,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279676342] [2022-02-11 01:15:43,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:15:43,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:43,413 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:43,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 01:15:43,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:15:43,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:43,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:15:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:43,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:43,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-11 01:15:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:43,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:43,918 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:15:43,918 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 19 treesize of output 54 [2022-02-11 01:15:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:44,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:44,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:44,021 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 20 treesize of output 47 [2022-02-11 01:15:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:44,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279676342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:44,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:44,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-11 01:15:44,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682661433] [2022-02-11 01:15:44,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:44,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:15:44,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:15:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:15:44,171 INFO L87 Difference]: Start difference. First operand 7830 states and 27226 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:50,128 INFO L93 Difference]: Finished difference Result 14476 states and 46100 transitions. [2022-02-11 01:15:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-11 01:15:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:15:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:50,158 INFO L225 Difference]: With dead ends: 14476 [2022-02-11 01:15:50,158 INFO L226 Difference]: Without dead ends: 14343 [2022-02-11 01:15:50,161 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1887, Invalid=16473, Unknown=0, NotChecked=0, Total=18360 [2022-02-11 01:15:50,161 INFO L934 BasicCegarLoop]: 88 mSDtfsCounter, 902 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 4562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:50,161 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1235 Invalid, 4562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3929 Invalid, 0 Unknown, 437 Unchecked, 1.5s Time] [2022-02-11 01:15:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2022-02-11 01:15:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 7848. [2022-02-11 01:15:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.4794188861985473) internal successors, (27303), 7847 states have internal predecessors, (27303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 27303 transitions. [2022-02-11 01:15:50,352 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 27303 transitions. Word has length 30 [2022-02-11 01:15:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:50,352 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 27303 transitions. [2022-02-11 01:15:50,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 27303 transitions. [2022-02-11 01:15:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:50,364 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:50,364 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:50,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-11 01:15:50,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-11 01:15:50,575 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash -815268852, now seen corresponding path program 19 times [2022-02-11 01:15:50,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:50,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143987714] [2022-02-11 01:15:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:50,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:50,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143987714] [2022-02-11 01:15:50,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143987714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:50,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567607985] [2022-02-11 01:15:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:15:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:50,848 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:50,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 01:15:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:15:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:51,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:15:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:51,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:51,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:51,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:15:51,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:51,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:51,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:51,626 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 19 treesize of output 46 [2022-02-11 01:15:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:51,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567607985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:51,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:51,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:15:51,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36853884] [2022-02-11 01:15:51,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:51,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:15:51,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:15:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:15:51,837 INFO L87 Difference]: Start difference. First operand 7848 states and 27303 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-02-11 01:15:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:57,032 INFO L93 Difference]: Finished difference Result 12337 states and 39312 transitions. [2022-02-11 01:15:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-11 01:15:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-02-11 01:15:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:57,058 INFO L225 Difference]: With dead ends: 12337 [2022-02-11 01:15:57,058 INFO L226 Difference]: Without dead ends: 12292 [2022-02-11 01:15:57,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4815 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1642, Invalid=11930, Unknown=0, NotChecked=0, Total=13572 [2022-02-11 01:15:57,059 INFO L934 BasicCegarLoop]: 53 mSDtfsCounter, 855 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:57,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 716 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:15:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12292 states. [2022-02-11 01:15:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12292 to 7843. [2022-02-11 01:15:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7843 states, 7842 states have (on average 3.479597041571028) internal successors, (27287), 7842 states have internal predecessors, (27287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7843 states to 7843 states and 27287 transitions. [2022-02-11 01:15:57,230 INFO L78 Accepts]: Start accepts. Automaton has 7843 states and 27287 transitions. Word has length 30 [2022-02-11 01:15:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:57,230 INFO L470 AbstractCegarLoop]: Abstraction has 7843 states and 27287 transitions. [2022-02-11 01:15:57,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-02-11 01:15:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7843 states and 27287 transitions. [2022-02-11 01:15:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:15:57,241 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:57,242 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:57,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-11 01:15:57,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:57,450 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:15:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:57,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1901164380, now seen corresponding path program 20 times [2022-02-11 01:15:57,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:57,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011471007] [2022-02-11 01:15:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:57,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:57,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011471007] [2022-02-11 01:15:57,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011471007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:57,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20155601] [2022-02-11 01:15:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:15:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:57,704 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:57,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 01:15:57,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:15:57,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:15:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:57,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:57,996 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 24 treesize of output 24 [2022-02-11 01:15:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:58,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:58,366 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:15:58,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:15:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:58,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:58,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:58,471 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 20 treesize of output 47 [2022-02-11 01:15:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:58,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20155601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:58,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:58,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 01:15:58,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616550516] [2022-02-11 01:15:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:58,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:15:58,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:15:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:15:58,590 INFO L87 Difference]: Start difference. First operand 7843 states and 27287 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:04,611 INFO L93 Difference]: Finished difference Result 14596 states and 46967 transitions. [2022-02-11 01:16:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-11 01:16:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:04,642 INFO L225 Difference]: With dead ends: 14596 [2022-02-11 01:16:04,642 INFO L226 Difference]: Without dead ends: 14492 [2022-02-11 01:16:04,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6252 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1633, Invalid=16727, Unknown=0, NotChecked=0, Total=18360 [2022-02-11 01:16:04,644 INFO L934 BasicCegarLoop]: 72 mSDtfsCounter, 844 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 4964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:04,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1076 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3827 Invalid, 0 Unknown, 966 Unchecked, 1.5s Time] [2022-02-11 01:16:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14492 states. [2022-02-11 01:16:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14492 to 7858. [2022-02-11 01:16:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.4789359806541937) internal successors, (27334), 7857 states have internal predecessors, (27334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 27334 transitions. [2022-02-11 01:16:04,828 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 27334 transitions. Word has length 30 [2022-02-11 01:16:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:04,828 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 27334 transitions. [2022-02-11 01:16:04,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 27334 transitions. [2022-02-11 01:16:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:04,841 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:04,842 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:04,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-11 01:16:05,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:05,046 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1211295284, now seen corresponding path program 21 times [2022-02-11 01:16:05,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:05,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799581286] [2022-02-11 01:16:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:05,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:05,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799581286] [2022-02-11 01:16:05,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799581286] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:05,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175415011] [2022-02-11 01:16:05,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:16:05,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:05,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:05,336 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:05,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 01:16:05,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:16:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:16:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:05,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:05,621 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 21 treesize of output 13 [2022-02-11 01:16:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:05,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:05,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:05,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:16:06,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:06,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:06,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:06,028 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 20 treesize of output 47 [2022-02-11 01:16:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:06,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175415011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:06,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:06,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-02-11 01:16:06,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72537331] [2022-02-11 01:16:06,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:06,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:06,146 INFO L87 Difference]: Start difference. First operand 7858 states and 27334 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2022-02-11 01:16:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:13,837 INFO L93 Difference]: Finished difference Result 13827 states and 44982 transitions. [2022-02-11 01:16:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-11 01:16:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 30 [2022-02-11 01:16:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:13,867 INFO L225 Difference]: With dead ends: 13827 [2022-02-11 01:16:13,867 INFO L226 Difference]: Without dead ends: 13797 [2022-02-11 01:16:13,869 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2214, Invalid=18092, Unknown=0, NotChecked=0, Total=20306 [2022-02-11 01:16:13,869 INFO L934 BasicCegarLoop]: 67 mSDtfsCounter, 623 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:13,869 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 948 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 01:16:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-02-11 01:16:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 7859. [2022-02-11 01:16:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-02-11 01:16:14,114 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-02-11 01:16:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:14,114 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-02-11 01:16:14,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2022-02-11 01:16:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-02-11 01:16:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:14,126 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:14,126 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:14,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:14,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-02-11 01:16:14,339 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527216, now seen corresponding path program 22 times [2022-02-11 01:16:14,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:14,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031194866] [2022-02-11 01:16:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:14,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:14,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031194866] [2022-02-11 01:16:14,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031194866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:14,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804903680] [2022-02-11 01:16:14,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:16:14,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:14,621 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:14,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 01:16:14,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:16:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:14,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:14,908 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 19 treesize of output 19 [2022-02-11 01:16:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:14,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:15,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:15,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:16:15,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:15,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:15,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-11 01:16:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:15,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804903680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:15,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:15,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-11 01:16:15,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097310757] [2022-02-11 01:16:15,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:15,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:15,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:15,617 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:16:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:26,879 INFO L93 Difference]: Finished difference Result 14735 states and 47614 transitions. [2022-02-11 01:16:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-02-11 01:16:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-02-11 01:16:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:26,920 INFO L225 Difference]: With dead ends: 14735 [2022-02-11 01:16:26,921 INFO L226 Difference]: Without dead ends: 14660 [2022-02-11 01:16:26,923 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12048 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3411, Invalid=27741, Unknown=0, NotChecked=0, Total=31152 [2022-02-11 01:16:26,923 INFO L934 BasicCegarLoop]: 97 mSDtfsCounter, 759 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 5762 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 6537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:26,923 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1546 Invalid, 6537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5762 Invalid, 0 Unknown, 524 Unchecked, 2.6s Time] [2022-02-11 01:16:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2022-02-11 01:16:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 7859. [2022-02-11 01:16:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-02-11 01:16:27,182 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-02-11 01:16:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:27,183 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-02-11 01:16:27,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:16:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-02-11 01:16:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:27,195 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:27,195 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:27,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:27,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:27,410 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1359410238, now seen corresponding path program 23 times [2022-02-11 01:16:27,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:27,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021977486] [2022-02-11 01:16:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:27,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:27,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021977486] [2022-02-11 01:16:27,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021977486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:27,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853776366] [2022-02-11 01:16:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:27,661 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:27,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 01:16:27,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:16:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:16:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:28,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,019 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 28 treesize of output 16 [2022-02-11 01:16:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:28,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:28,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:28,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 54 [2022-02-11 01:16:28,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:28,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:28,520 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 20 treesize of output 47 [2022-02-11 01:16:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:28,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853776366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:28,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:28,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-11 01:16:28,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139033805] [2022-02-11 01:16:28,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:28,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:16:28,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:16:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:16:28,718 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-02-11 01:16:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:34,192 INFO L93 Difference]: Finished difference Result 12864 states and 41779 transitions. [2022-02-11 01:16:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-11 01:16:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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 30 [2022-02-11 01:16:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:34,226 INFO L225 Difference]: With dead ends: 12864 [2022-02-11 01:16:34,226 INFO L226 Difference]: Without dead ends: 12834 [2022-02-11 01:16:34,228 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3794 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1478, Invalid=9864, Unknown=0, NotChecked=0, Total=11342 [2022-02-11 01:16:34,228 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:34,228 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 567 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:16:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-02-11 01:16:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 7861. [2022-02-11 01:16:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 7860 states have (on average 3.4790076335877864) internal successors, (27345), 7860 states have internal predecessors, (27345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 27345 transitions. [2022-02-11 01:16:34,479 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 27345 transitions. Word has length 30 [2022-02-11 01:16:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 27345 transitions. [2022-02-11 01:16:34,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-02-11 01:16:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 27345 transitions. [2022-02-11 01:16:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:34,492 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:34,493 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:34,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-11 01:16:34,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:34,709 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1324381350, now seen corresponding path program 24 times [2022-02-11 01:16:34,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:34,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799462105] [2022-02-11 01:16:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:34,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:34,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799462105] [2022-02-11 01:16:34,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799462105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:34,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099037447] [2022-02-11 01:16:34,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:34,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:34,966 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 01:16:34,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:16:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:16:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:35,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:35,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-02-11 01:16:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:35,670 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:16:35,670 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 19 treesize of output 54 [2022-02-11 01:16:35,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:35,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:35,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:35,818 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 20 treesize of output 47 [2022-02-11 01:16:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:35,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099037447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:35,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:35,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-11 01:16:35,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548164163] [2022-02-11 01:16:35,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:35,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:16:35,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:16:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:16:35,999 INFO L87 Difference]: Start difference. First operand 7861 states and 27345 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:44,741 INFO L93 Difference]: Finished difference Result 13877 states and 45561 transitions. [2022-02-11 01:16:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-11 01:16:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:16:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:44,772 INFO L225 Difference]: With dead ends: 13877 [2022-02-11 01:16:44,772 INFO L226 Difference]: Without dead ends: 13845 [2022-02-11 01:16:44,773 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1637, Invalid=14113, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 01:16:44,773 INFO L934 BasicCegarLoop]: 64 mSDtfsCounter, 643 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:44,773 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 982 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3974 Invalid, 0 Unknown, 458 Unchecked, 1.9s Time] [2022-02-11 01:16:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-02-11 01:16:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 7898. [2022-02-11 01:16:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7897 states have (on average 3.4795491958971763) internal successors, (27478), 7897 states have internal predecessors, (27478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 27478 transitions. [2022-02-11 01:16:44,979 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 27478 transitions. Word has length 30 [2022-02-11 01:16:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 27478 transitions. [2022-02-11 01:16:44,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 27478 transitions. [2022-02-11 01:16:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:44,993 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:44,993 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:45,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-11 01:16:45,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:45,209 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:45,209 INFO L85 PathProgramCache]: Analyzing trace with hash -511893078, now seen corresponding path program 25 times [2022-02-11 01:16:45,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:45,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039420387] [2022-02-11 01:16:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:45,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:45,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:45,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039420387] [2022-02-11 01:16:45,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039420387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:45,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266862477] [2022-02-11 01:16:45,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:45,477 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:45,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 01:16:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:16:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:45,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:45,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:16:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:46,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:46,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:46,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:16:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:46,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:46,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:46,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-11 01:16:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:46,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266862477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:46,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:46,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-02-11 01:16:46,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080790319] [2022-02-11 01:16:46,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:46,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:46,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:46,447 INFO L87 Difference]: Start difference. First operand 7898 states and 27478 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:16:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:52,398 INFO L93 Difference]: Finished difference Result 13318 states and 43304 transitions. [2022-02-11 01:16:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-11 01:16:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-02-11 01:16:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:52,434 INFO L225 Difference]: With dead ends: 13318 [2022-02-11 01:16:52,434 INFO L226 Difference]: Without dead ends: 13296 [2022-02-11 01:16:52,436 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2084, Invalid=14428, Unknown=0, NotChecked=0, Total=16512 [2022-02-11 01:16:52,436 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 791 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:52,436 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 720 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:16:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13296 states. [2022-02-11 01:16:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13296 to 7899. [2022-02-11 01:16:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 7898 states have (on average 3.479615092428463) internal successors, (27482), 7898 states have internal predecessors, (27482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 27482 transitions. [2022-02-11 01:16:52,658 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 27482 transitions. Word has length 30 [2022-02-11 01:16:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:52,658 INFO L470 AbstractCegarLoop]: Abstraction has 7899 states and 27482 transitions. [2022-02-11 01:16:52,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:16:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 27482 transitions. [2022-02-11 01:16:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:16:52,672 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:52,672 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:52,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:52,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-02-11 01:16:52,883 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:16:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash 456149418, now seen corresponding path program 26 times [2022-02-11 01:16:52,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:52,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313190057] [2022-02-11 01:16:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:53,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:53,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313190057] [2022-02-11 01:16:53,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313190057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:53,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607619183] [2022-02-11 01:16:53,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:53,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:53,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:53,086 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:53,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 01:16:53,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:16:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:16:53,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:53,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:53,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2022-02-11 01:16:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:53,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:53,949 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:16:53,949 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 19 treesize of output 54 [2022-02-11 01:16:54,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:54,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:54,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-11 01:16:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:54,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607619183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:54,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:54,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-02-11 01:16:54,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8912869] [2022-02-11 01:16:54,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:16:54,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:16:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:16:54,296 INFO L87 Difference]: Start difference. First operand 7899 states and 27482 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:10,128 INFO L93 Difference]: Finished difference Result 16236 states and 52944 transitions. [2022-02-11 01:17:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-02-11 01:17:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:10,168 INFO L225 Difference]: With dead ends: 16236 [2022-02-11 01:17:10,168 INFO L226 Difference]: Without dead ends: 16184 [2022-02-11 01:17:10,171 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18212 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=6022, Invalid=38710, Unknown=0, NotChecked=0, Total=44732 [2022-02-11 01:17:10,171 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 1103 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 6773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:10,171 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 966 Invalid, 6773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 4879 Invalid, 0 Unknown, 1427 Unchecked, 2.4s Time] [2022-02-11 01:17:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-02-11 01:17:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 7938. [2022-02-11 01:17:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7938 states, 7937 states have (on average 3.4833060350258283) internal successors, (27647), 7937 states have internal predecessors, (27647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 27647 transitions. [2022-02-11 01:17:10,450 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 27647 transitions. Word has length 30 [2022-02-11 01:17:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:10,450 INFO L470 AbstractCegarLoop]: Abstraction has 7938 states and 27647 transitions. [2022-02-11 01:17:10,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 27647 transitions. [2022-02-11 01:17:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:10,463 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:10,463 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:10,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:10,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-11 01:17:10,679 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash -801041019, now seen corresponding path program 22 times [2022-02-11 01:17:10,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:10,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764787488] [2022-02-11 01:17:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:11,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:11,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764787488] [2022-02-11 01:17:11,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764787488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:11,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060576959] [2022-02-11 01:17:11,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:17:11,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:11,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:11,033 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:11,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 01:17:11,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:17:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:17:11,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:11,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 18 [2022-02-11 01:17:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:11,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:11,499 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:11,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-02-11 01:17:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:11,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:17:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:11,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060576959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:11,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:11,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 01:17:11,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010915920] [2022-02-11 01:17:11,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:17:11,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:17:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:17:11,591 INFO L87 Difference]: Start difference. First operand 7938 states and 27647 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:17,674 INFO L93 Difference]: Finished difference Result 16154 states and 53648 transitions. [2022-02-11 01:17:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-11 01:17:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:17,708 INFO L225 Difference]: With dead ends: 16154 [2022-02-11 01:17:17,708 INFO L226 Difference]: Without dead ends: 16107 [2022-02-11 01:17:17,709 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2594, Invalid=13918, Unknown=0, NotChecked=0, Total=16512 [2022-02-11 01:17:17,709 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 865 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:17,709 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 783 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 01:17:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16107 states. [2022-02-11 01:17:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16107 to 7951. [2022-02-11 01:17:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.4813836477987423) internal successors, (27677), 7950 states have internal predecessors, (27677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 27677 transitions. [2022-02-11 01:17:17,910 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 27677 transitions. Word has length 30 [2022-02-11 01:17:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 27677 transitions. [2022-02-11 01:17:17,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 27677 transitions. [2022-02-11 01:17:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:17,923 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:17,923 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:17,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-11 01:17:18,139 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -312520331, now seen corresponding path program 23 times [2022-02-11 01:17:18,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:18,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284461055] [2022-02-11 01:17:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:18,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:18,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284461055] [2022-02-11 01:17:18,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284461055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:18,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80917665] [2022-02-11 01:17:18,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:17:18,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:18,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:18,387 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:18,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 01:17:18,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:17:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:17:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:18,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:18,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-02-11 01:17:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:18,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:18,872 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:18,872 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 21 treesize of output 46 [2022-02-11 01:17:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:18,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:17:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:18,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80917665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:18,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:18,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-02-11 01:17:18,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793552820] [2022-02-11 01:17:18,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:18,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:17:18,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:17:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:17:18,969 INFO L87 Difference]: Start difference. First operand 7951 states and 27677 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:40,298 INFO L93 Difference]: Finished difference Result 20702 states and 67784 transitions. [2022-02-11 01:17:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-02-11 01:17:40,299 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:40,347 INFO L225 Difference]: With dead ends: 20702 [2022-02-11 01:17:40,348 INFO L226 Difference]: Without dead ends: 20654 [2022-02-11 01:17:40,351 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41453 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=9257, Invalid=85915, Unknown=0, NotChecked=0, Total=95172 [2022-02-11 01:17:40,351 INFO L934 BasicCegarLoop]: 75 mSDtfsCounter, 1124 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 5521 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 5521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:40,351 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1159 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 5521 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-11 01:17:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2022-02-11 01:17:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 7972. [2022-02-11 01:17:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 3.482749968636307) internal successors, (27761), 7971 states have internal predecessors, (27761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 27761 transitions. [2022-02-11 01:17:40,609 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 27761 transitions. Word has length 30 [2022-02-11 01:17:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:40,609 INFO L470 AbstractCegarLoop]: Abstraction has 7972 states and 27761 transitions. [2022-02-11 01:17:40,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 27761 transitions. [2022-02-11 01:17:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:40,622 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:40,622 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:40,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-11 01:17:40,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-11 01:17:40,837 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash -53764609, now seen corresponding path program 24 times [2022-02-11 01:17:40,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:40,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733539904] [2022-02-11 01:17:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:40,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:41,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:41,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733539904] [2022-02-11 01:17:41,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733539904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:41,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212447791] [2022-02-11 01:17:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:17:41,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:41,279 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:41,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 01:17:41,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:17:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:41,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 01:17:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:41,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:41,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:41,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-02-11 01:17:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:41,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:42,174 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:17:42,174 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 21 treesize of output 46 [2022-02-11 01:17:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:42,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:42,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-02-11 01:17:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:42,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212447791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:42,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:42,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-02-11 01:17:42,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214517284] [2022-02-11 01:17:42,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:42,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:17:42,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:17:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:17:42,331 INFO L87 Difference]: Start difference. First operand 7972 states and 27761 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:51,436 INFO L93 Difference]: Finished difference Result 16143 states and 53625 transitions. [2022-02-11 01:17:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-11 01:17:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:17:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:51,472 INFO L225 Difference]: With dead ends: 16143 [2022-02-11 01:17:51,472 INFO L226 Difference]: Without dead ends: 16096 [2022-02-11 01:17:51,473 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9478 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3565, Invalid=20927, Unknown=0, NotChecked=0, Total=24492 [2022-02-11 01:17:51,474 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 899 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:51,474 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 887 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:17:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2022-02-11 01:17:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 7981. [2022-02-11 01:17:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.4845864661654136) internal successors, (27807), 7980 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 27807 transitions. [2022-02-11 01:17:51,667 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 27807 transitions. Word has length 30 [2022-02-11 01:17:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:51,667 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 27807 transitions. [2022-02-11 01:17:51,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 27807 transitions. [2022-02-11 01:17:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:51,699 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:51,699 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:51,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:51,900 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 740544464, now seen corresponding path program 27 times [2022-02-11 01:17:51,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:51,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446066746] [2022-02-11 01:17:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:52,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:52,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446066746] [2022-02-11 01:17:52,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446066746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:52,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711642930] [2022-02-11 01:17:52,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:17:52,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:52,141 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:52,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 01:17:52,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:17:52,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:17:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:52,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:52,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:52,427 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 21 treesize of output 13 [2022-02-11 01:17:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:52,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:52,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 69 [2022-02-11 01:17:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:53,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711642930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:53,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:53,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-02-11 01:17:53,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744100030] [2022-02-11 01:17:53,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:53,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:17:53,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:17:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:17:53,175 INFO L87 Difference]: Start difference. First operand 7981 states and 27807 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:17:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:57,753 INFO L93 Difference]: Finished difference Result 12813 states and 40793 transitions. [2022-02-11 01:17:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-11 01:17:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-02-11 01:17:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:57,784 INFO L225 Difference]: With dead ends: 12813 [2022-02-11 01:17:57,785 INFO L226 Difference]: Without dead ends: 12791 [2022-02-11 01:17:57,786 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1705, Invalid=14297, Unknown=0, NotChecked=0, Total=16002 [2022-02-11 01:17:57,790 INFO L934 BasicCegarLoop]: 53 mSDtfsCounter, 621 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:57,790 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 813 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2495 Invalid, 0 Unknown, 1245 Unchecked, 1.0s Time] [2022-02-11 01:17:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-02-11 01:17:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 7977. [2022-02-11 01:17:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.484704112337011) internal successors, (27794), 7976 states have internal predecessors, (27794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:17:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27794 transitions. [2022-02-11 01:17:58,012 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27794 transitions. Word has length 30 [2022-02-11 01:17:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 27794 transitions. [2022-02-11 01:17:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:17:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27794 transitions. [2022-02-11 01:17:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:17:58,026 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:17:58,027 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:17:58,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-11 01:17:58,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:58,240 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:17:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:17:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash 193579860, now seen corresponding path program 28 times [2022-02-11 01:17:58,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:17:58,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126849274] [2022-02-11 01:17:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:17:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:17:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:17:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:58,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:17:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126849274] [2022-02-11 01:17:58,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126849274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:17:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487119886] [2022-02-11 01:17:58,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:17:58,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:17:58,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:17:58,445 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:17:58,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 01:17:58,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:17:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:17:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:17:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:17:58,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:17:58,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:17:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:58,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:58,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:58,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:58,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:17:59,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:17:59,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:17:59,039 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 20 treesize of output 47 [2022-02-11 01:17:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:59,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487119886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:59,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:59,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-02-11 01:17:59,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26483796] [2022-02-11 01:17:59,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:59,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:17:59,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:17:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:17:59,177 INFO L87 Difference]: Start difference. First operand 7977 states and 27794 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:18:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:06,043 INFO L93 Difference]: Finished difference Result 13886 states and 45259 transitions. [2022-02-11 01:18:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-11 01:18:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-02-11 01:18:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:06,079 INFO L225 Difference]: With dead ends: 13886 [2022-02-11 01:18:06,080 INFO L226 Difference]: Without dead ends: 13864 [2022-02-11 01:18:06,081 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2247, Invalid=18923, Unknown=0, NotChecked=0, Total=21170 [2022-02-11 01:18:06,081 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 588 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:06,081 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 849 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:18:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2022-02-11 01:18:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 7979. [2022-02-11 01:18:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7978 states have (on average 3.484707946853848) internal successors, (27801), 7978 states have internal predecessors, (27801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27801 transitions. [2022-02-11 01:18:06,302 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27801 transitions. Word has length 30 [2022-02-11 01:18:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:06,302 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27801 transitions. [2022-02-11 01:18:06,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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) [2022-02-11 01:18:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27801 transitions. [2022-02-11 01:18:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:06,315 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:06,315 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:06,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:06,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:06,531 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1161622356, now seen corresponding path program 29 times [2022-02-11 01:18:06,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:06,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468267153] [2022-02-11 01:18:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:06,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468267153] [2022-02-11 01:18:06,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468267153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770674047] [2022-02-11 01:18:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:18:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:06,730 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 01:18:06,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:18:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:18:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:18:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:18:06,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:06,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-02-11 01:18:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:07,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:07,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:07,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:18:07,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:07,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:07,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:07,370 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 20 treesize of output 47 [2022-02-11 01:18:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:07,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770674047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:07,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:07,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-02-11 01:18:07,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216896154] [2022-02-11 01:18:07,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:07,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:18:07,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:18:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:18:07,535 INFO L87 Difference]: Start difference. First operand 7979 states and 27801 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2022-02-11 01:18:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:20,232 INFO L93 Difference]: Finished difference Result 15043 states and 48614 transitions. [2022-02-11 01:18:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-02-11 01:18:20,232 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 30 [2022-02-11 01:18:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:20,266 INFO L225 Difference]: With dead ends: 15043 [2022-02-11 01:18:20,267 INFO L226 Difference]: Without dead ends: 15014 [2022-02-11 01:18:20,269 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15351 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3955, Invalid=35447, Unknown=0, NotChecked=0, Total=39402 [2022-02-11 01:18:20,269 INFO L934 BasicCegarLoop]: 81 mSDtfsCounter, 688 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:20,269 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1211 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-11 01:18:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15014 states. [2022-02-11 01:18:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15014 to 7976. [2022-02-11 01:18:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7976 states, 7975 states have (on average 3.484388714733542) internal successors, (27788), 7975 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 27788 transitions. [2022-02-11 01:18:20,492 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 27788 transitions. Word has length 30 [2022-02-11 01:18:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 7976 states and 27788 transitions. [2022-02-11 01:18:20,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2022-02-11 01:18:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 27788 transitions. [2022-02-11 01:18:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:20,506 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:20,506 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:20,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:20,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:20,719 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1258533564, now seen corresponding path program 30 times [2022-02-11 01:18:20,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:20,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751542176] [2022-02-11 01:18:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:21,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:21,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751542176] [2022-02-11 01:18:21,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751542176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:21,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918284453] [2022-02-11 01:18:21,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:18:21,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:21,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:21,244 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:21,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 01:18:21,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:18:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:18:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:18:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:21,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:21,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-02-11 01:18:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:22,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:22,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:22,547 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 19 treesize of output 46 [2022-02-11 01:18:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:22,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-11 01:18:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:22,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918284453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:22,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:22,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-11 01:18:22,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463385681] [2022-02-11 01:18:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:18:22,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:18:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:18:22,723 INFO L87 Difference]: Start difference. First operand 7976 states and 27788 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:39,355 INFO L93 Difference]: Finished difference Result 15939 states and 52512 transitions. [2022-02-11 01:18:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-02-11 01:18:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:18:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:39,392 INFO L225 Difference]: With dead ends: 15939 [2022-02-11 01:18:39,393 INFO L226 Difference]: Without dead ends: 15826 [2022-02-11 01:18:39,394 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19742 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5763, Invalid=43743, Unknown=0, NotChecked=0, Total=49506 [2022-02-11 01:18:39,394 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 1204 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 7247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2076 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:39,395 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1171 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 4737 Invalid, 0 Unknown, 2076 Unchecked, 2.5s Time] [2022-02-11 01:18:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2022-02-11 01:18:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 8034. [2022-02-11 01:18:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 3.487364620938628) internal successors, (28014), 8033 states have internal predecessors, (28014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 28014 transitions. [2022-02-11 01:18:39,619 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 28014 transitions. Word has length 30 [2022-02-11 01:18:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:39,619 INFO L470 AbstractCegarLoop]: Abstraction has 8034 states and 28014 transitions. [2022-02-11 01:18:39,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 28014 transitions. [2022-02-11 01:18:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:39,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:39,633 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:39,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 01:18:39,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:39,848 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash -553862034, now seen corresponding path program 31 times [2022-02-11 01:18:39,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:39,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252841415] [2022-02-11 01:18:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:40,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:40,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252841415] [2022-02-11 01:18:40,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252841415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:40,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250901247] [2022-02-11 01:18:40,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:18:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:40,189 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:40,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 01:18:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:18:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:18:40,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:40,423 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-02-11 01:18:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:40,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:40,724 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:18:40,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:18:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:40,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:40,853 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 20 treesize of output 47 [2022-02-11 01:18:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:40,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250901247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:40,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:40,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 01:18:40,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335390652] [2022-02-11 01:18:40,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:40,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:18:40,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:18:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:18:41,002 INFO L87 Difference]: Start difference. First operand 8034 states and 28014 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-02-11 01:18:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:44,140 INFO L93 Difference]: Finished difference Result 14061 states and 46525 transitions. [2022-02-11 01:18:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 01:18:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-02-11 01:18:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:44,174 INFO L225 Difference]: With dead ends: 14061 [2022-02-11 01:18:44,174 INFO L226 Difference]: Without dead ends: 14020 [2022-02-11 01:18:44,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=810, Invalid=6846, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 01:18:44,175 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 499 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:44,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 777 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 517 Unchecked, 1.1s Time] [2022-02-11 01:18:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14020 states. [2022-02-11 01:18:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14020 to 8023. [2022-02-11 01:18:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8023 states, 8022 states have (on average 3.486661680378958) internal successors, (27970), 8022 states have internal predecessors, (27970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8023 states to 8023 states and 27970 transitions. [2022-02-11 01:18:44,435 INFO L78 Accepts]: Start accepts. Automaton has 8023 states and 27970 transitions. Word has length 30 [2022-02-11 01:18:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:18:44,435 INFO L470 AbstractCegarLoop]: Abstraction has 8023 states and 27970 transitions. [2022-02-11 01:18:44,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-02-11 01:18:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8023 states and 27970 transitions. [2022-02-11 01:18:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:18:44,447 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:18:44,447 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:18:44,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-11 01:18:44,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-11 01:18:44,662 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:18:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:18:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2072629490, now seen corresponding path program 32 times [2022-02-11 01:18:44,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:18:44,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669329658] [2022-02-11 01:18:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:18:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:18:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:18:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:44,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:18:44,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669329658] [2022-02-11 01:18:44,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669329658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:18:44,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044119371] [2022-02-11 01:18:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:18:44,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:18:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:18:44,955 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:18:44,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 01:18:44,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:18:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:18:44,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:18:44,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:18:45,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:45,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-02-11 01:18:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:45,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:18:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:45,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:18:45,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-02-11 01:18:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:18:46,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-11 01:18:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:18:46,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044119371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:18:46,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:18:46,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-02-11 01:18:46,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238476381] [2022-02-11 01:18:46,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:18:46,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:18:46,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:18:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:18:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:18:46,144 INFO L87 Difference]: Start difference. First operand 8023 states and 27970 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:18:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:18:59,887 INFO L93 Difference]: Finished difference Result 16255 states and 54161 transitions. [2022-02-11 01:18:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-02-11 01:18:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:18:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:18:59,931 INFO L225 Difference]: With dead ends: 16255 [2022-02-11 01:18:59,931 INFO L226 Difference]: Without dead ends: 16202 [2022-02-11 01:18:59,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17497 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4968, Invalid=40188, Unknown=0, NotChecked=0, Total=45156 [2022-02-11 01:18:59,935 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 1035 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 7514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 4579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2533 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:18:59,935 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1056 Invalid, 7514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 4579 Invalid, 0 Unknown, 2533 Unchecked, 2.2s Time] [2022-02-11 01:18:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2022-02-11 01:19:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 8006. [2022-02-11 01:19:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8006 states, 8005 states have (on average 3.484946908182386) internal successors, (27897), 8005 states have internal predecessors, (27897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 27897 transitions. [2022-02-11 01:19:00,188 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 27897 transitions. Word has length 30 [2022-02-11 01:19:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:00,188 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 27897 transitions. [2022-02-11 01:19:00,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 27897 transitions. [2022-02-11 01:19:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:00,202 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:00,202 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:00,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:00,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-11 01:19:00,418 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash -638630994, now seen corresponding path program 33 times [2022-02-11 01:19:00,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:00,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852179225] [2022-02-11 01:19:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:00,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:00,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852179225] [2022-02-11 01:19:00,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852179225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:00,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063753623] [2022-02-11 01:19:00,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:19:00,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:00,654 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:00,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 01:19:00,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:19:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:19:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:00,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:00,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-02-11 01:19:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:01,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:01,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:01,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-02-11 01:19:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:02,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063753623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:02,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:02,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-11 01:19:02,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882097238] [2022-02-11 01:19:02,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:19:02,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:19:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:19:02,098 INFO L87 Difference]: Start difference. First operand 8006 states and 27897 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:19:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:05,793 INFO L93 Difference]: Finished difference Result 13775 states and 45224 transitions. [2022-02-11 01:19:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-11 01:19:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-02-11 01:19:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:05,824 INFO L225 Difference]: With dead ends: 13775 [2022-02-11 01:19:05,825 INFO L226 Difference]: Without dead ends: 13768 [2022-02-11 01:19:05,825 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4252 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1425, Invalid=10347, Unknown=0, NotChecked=0, Total=11772 [2022-02-11 01:19:05,827 INFO L934 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:05,827 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 705 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2859 Invalid, 0 Unknown, 722 Unchecked, 1.0s Time] [2022-02-11 01:19:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13768 states. [2022-02-11 01:19:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13768 to 8005. [2022-02-11 01:19:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8004 states have (on average 3.48488255872064) internal successors, (27893), 8004 states have internal predecessors, (27893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 27893 transitions. [2022-02-11 01:19:06,058 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 27893 transitions. Word has length 30 [2022-02-11 01:19:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:06,058 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 27893 transitions. [2022-02-11 01:19:06,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:19:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 27893 transitions. [2022-02-11 01:19:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:06,073 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:06,073 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:06,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:06,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:06,290 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 459794410, now seen corresponding path program 34 times [2022-02-11 01:19:06,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:06,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528391965] [2022-02-11 01:19:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:06,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:06,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528391965] [2022-02-11 01:19:06,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528391965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:06,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457929973] [2022-02-11 01:19:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:19:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:06,624 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:06,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 01:19:06,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:19:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:19:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:06,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:06,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:06,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-02-11 01:19:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:07,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:07,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:07,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:07,316 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:19:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:07,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:07,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:07,468 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 20 treesize of output 47 [2022-02-11 01:19:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:07,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457929973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:07,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:07,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-02-11 01:19:07,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443146966] [2022-02-11 01:19:07,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:07,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:19:07,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:19:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:19:07,675 INFO L87 Difference]: Start difference. First operand 8005 states and 27893 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:19:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:12,747 INFO L93 Difference]: Finished difference Result 13077 states and 42731 transitions. [2022-02-11 01:19:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 01:19:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-02-11 01:19:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:12,779 INFO L225 Difference]: With dead ends: 13077 [2022-02-11 01:19:12,779 INFO L226 Difference]: Without dead ends: 13040 [2022-02-11 01:19:12,779 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1218, Invalid=8288, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:19:12,780 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 449 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:12,780 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 715 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2836 Invalid, 0 Unknown, 449 Unchecked, 1.4s Time] [2022-02-11 01:19:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13040 states. [2022-02-11 01:19:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13040 to 8004. [2022-02-11 01:19:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 3.48494314632013) internal successors, (27890), 8003 states have internal predecessors, (27890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 27890 transitions. [2022-02-11 01:19:12,965 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 27890 transitions. Word has length 30 [2022-02-11 01:19:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:12,965 INFO L470 AbstractCegarLoop]: Abstraction has 8004 states and 27890 transitions. [2022-02-11 01:19:12,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2022-02-11 01:19:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 27890 transitions. [2022-02-11 01:19:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:12,979 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:12,979 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:12,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:13,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:13,196 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496730, now seen corresponding path program 35 times [2022-02-11 01:19:13,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:13,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593186039] [2022-02-11 01:19:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:13,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:13,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593186039] [2022-02-11 01:19:13,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593186039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:13,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934007515] [2022-02-11 01:19:13,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:19:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:13,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:13,522 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 01:19:13,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:19:13,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:19:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:13,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:13,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 01:19:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:13,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:14,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:14,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:14,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:19:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:14,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:14,396 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 20 treesize of output 47 [2022-02-11 01:19:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:14,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934007515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:14,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:14,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-11 01:19:14,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105528309] [2022-02-11 01:19:14,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:14,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:19:14,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:19:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:19:14,579 INFO L87 Difference]: Start difference. First operand 8004 states and 27890 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-02-11 01:19:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:18,952 INFO L93 Difference]: Finished difference Result 12790 states and 41775 transitions. [2022-02-11 01:19:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 01:19:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 30 [2022-02-11 01:19:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:18,984 INFO L225 Difference]: With dead ends: 12790 [2022-02-11 01:19:18,985 INFO L226 Difference]: Without dead ends: 12783 [2022-02-11 01:19:18,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1075, Invalid=7115, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:19:18,986 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:18,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 547 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 01:19:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-02-11 01:19:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 8007. [2022-02-11 01:19:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8007 states, 8006 states have (on average 3.4850112415688232) internal successors, (27901), 8006 states have internal predecessors, (27901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 27901 transitions. [2022-02-11 01:19:19,184 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 27901 transitions. Word has length 30 [2022-02-11 01:19:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:19,184 INFO L470 AbstractCegarLoop]: Abstraction has 8007 states and 27901 transitions. [2022-02-11 01:19:19,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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) [2022-02-11 01:19:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 27901 transitions. [2022-02-11 01:19:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:19,197 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:19,197 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:19,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-11 01:19:19,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:19,399 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1285608810, now seen corresponding path program 36 times [2022-02-11 01:19:19,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:19,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991649788] [2022-02-11 01:19:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:19,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:19,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991649788] [2022-02-11 01:19:19,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991649788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:19,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815083898] [2022-02-11 01:19:19,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:19:19,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:19,686 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:19,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 01:19:19,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:19:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:19:19,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:19,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:19,873 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-11 01:19:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:19,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:20,175 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:19:20,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:19:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:20,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:20,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:20,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-11 01:19:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:20,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815083898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:20,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:20,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-11 01:19:20,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380447392] [2022-02-11 01:19:20,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:19:20,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:19:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:19:20,389 INFO L87 Difference]: Start difference. First operand 8007 states and 27901 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:26,335 INFO L93 Difference]: Finished difference Result 13667 states and 45204 transitions. [2022-02-11 01:19:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 01:19:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:19:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:26,365 INFO L225 Difference]: With dead ends: 13667 [2022-02-11 01:19:26,365 INFO L226 Difference]: Without dead ends: 13630 [2022-02-11 01:19:26,366 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=942, Invalid=8564, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:19:26,366 INFO L934 BasicCegarLoop]: 67 mSDtfsCounter, 530 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:26,366 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 888 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3495 Invalid, 0 Unknown, 372 Unchecked, 1.6s Time] [2022-02-11 01:19:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13630 states. [2022-02-11 01:19:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13630 to 7954. [2022-02-11 01:19:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 3.4853514397082863) internal successors, (27719), 7953 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 27719 transitions. [2022-02-11 01:19:26,556 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 27719 transitions. Word has length 30 [2022-02-11 01:19:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:26,557 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 27719 transitions. [2022-02-11 01:19:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 27719 transitions. [2022-02-11 01:19:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:26,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:26,569 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:26,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-11 01:19:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-11 01:19:26,775 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 788969820, now seen corresponding path program 37 times [2022-02-11 01:19:26,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:26,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053910215] [2022-02-11 01:19:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:27,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:27,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053910215] [2022-02-11 01:19:27,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053910215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:27,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017333919] [2022-02-11 01:19:27,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:19:27,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:27,064 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:27,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 01:19:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 01:19:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:27,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 01:19:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:27,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:27,555 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:19:27,556 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 19 treesize of output 54 [2022-02-11 01:19:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:27,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:27,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:27,679 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 19 treesize of output 46 [2022-02-11 01:19:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:27,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017333919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:27,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:27,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-11 01:19:27,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794199839] [2022-02-11 01:19:27,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:27,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:19:27,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:19:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:19:27,800 INFO L87 Difference]: Start difference. First operand 7954 states and 27719 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:31,897 INFO L93 Difference]: Finished difference Result 13093 states and 42430 transitions. [2022-02-11 01:19:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:19:31,897 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:19:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:31,927 INFO L225 Difference]: With dead ends: 13093 [2022-02-11 01:19:31,927 INFO L226 Difference]: Without dead ends: 13048 [2022-02-11 01:19:31,928 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1105, Invalid=9607, Unknown=0, NotChecked=0, Total=10712 [2022-02-11 01:19:31,928 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 554 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:31,928 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 858 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:19:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2022-02-11 01:19:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 7969. [2022-02-11 01:19:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7969 states, 7968 states have (on average 3.487449799196787) internal successors, (27788), 7968 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 27788 transitions. [2022-02-11 01:19:32,153 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 27788 transitions. Word has length 30 [2022-02-11 01:19:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 7969 states and 27788 transitions. [2022-02-11 01:19:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 27788 transitions. [2022-02-11 01:19:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:32,168 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:32,168 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:32,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:32,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-11 01:19:32,384 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2049272556, now seen corresponding path program 38 times [2022-02-11 01:19:32,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:32,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59995658] [2022-02-11 01:19:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:32,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:32,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:32,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59995658] [2022-02-11 01:19:32,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59995658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:32,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793679669] [2022-02-11 01:19:32,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:19:32,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:32,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:32,613 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:32,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 01:19:32,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:19:32,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:19:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:19:32,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:32,817 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 24 treesize of output 24 [2022-02-11 01:19:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:19:33,147 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-11 01:19:33,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-02-11 01:19:33,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:33,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:19:33,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:33,273 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 20 treesize of output 47 [2022-02-11 01:19:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:33,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793679669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:19:33,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:19:33,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-11 01:19:33,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480051612] [2022-02-11 01:19:33,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:19:33,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:19:33,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:19:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:19:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:19:33,419 INFO L87 Difference]: Start difference. First operand 7969 states and 27788 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:19:39,408 INFO L93 Difference]: Finished difference Result 14336 states and 46397 transitions. [2022-02-11 01:19:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 01:19:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 01:19:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:19:39,439 INFO L225 Difference]: With dead ends: 14336 [2022-02-11 01:19:39,440 INFO L226 Difference]: Without dead ends: 14232 [2022-02-11 01:19:39,440 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1246, Invalid=11636, Unknown=0, NotChecked=0, Total=12882 [2022-02-11 01:19:39,441 INFO L934 BasicCegarLoop]: 89 mSDtfsCounter, 523 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4731 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:19:39,441 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1359 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4731 Invalid, 0 Unknown, 317 Unchecked, 2.1s Time] [2022-02-11 01:19:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2022-02-11 01:19:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 7968. [2022-02-11 01:19:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7968 states, 7967 states have (on average 3.4853771808710934) internal successors, (27768), 7967 states have internal predecessors, (27768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 27768 transitions. [2022-02-11 01:19:39,643 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 27768 transitions. Word has length 30 [2022-02-11 01:19:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:19:39,643 INFO L470 AbstractCegarLoop]: Abstraction has 7968 states and 27768 transitions. [2022-02-11 01:19:39,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:19:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 27768 transitions. [2022-02-11 01:19:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 01:19:39,656 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:19:39,656 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:19:39,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 01:19:39,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-11 01:19:39,872 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 01:19:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:19:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash -368775916, now seen corresponding path program 39 times [2022-02-11 01:19:39,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:19:39,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555777410] [2022-02-11 01:19:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:19:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:19:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:19:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:19:40,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:19:40,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555777410] [2022-02-11 01:19:40,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555777410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:19:40,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248394086] [2022-02-11 01:19:40,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:19:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:19:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:19:40,119 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:19:40,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 01:19:40,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:19:40,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:19:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:19:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:19:40,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:19:40,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-02-11 01:27:45,512 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-11 01:27:45,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-11 01:27:45,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 01:27:45,539 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 [2022-02-11 01:27:45,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:27:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-11 01:27:45,727 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 0ms.. [2022-02-11 01:27:45,729 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-11 01:27:45,729 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-11 01:27:45,729 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-11 01:27:45,731 INFO L733 BasicCegarLoop]: Path program histogram: [39, 29, 24, 6, 3, 2, 1] [2022-02-11 01:27:45,733 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:27:45,733 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:27:45,735 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:27:45 BasicIcfg [2022-02-11 01:27:45,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:27:45,736 INFO L158 Benchmark]: Toolchain (without parser) took 882459.88ms. Allocated memory was 196.1MB in the beginning and 859.8MB in the end (delta: 663.7MB). Free memory was 154.9MB in the beginning and 517.4MB in the end (delta: -362.5MB). Peak memory consumption was 751.8MB. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 196.1MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.62ms. Allocated memory is still 196.1MB. Free memory was 154.9MB in the beginning and 153.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 INFO L158 Benchmark]: Boogie Preprocessor took 15.72ms. Allocated memory is still 196.1MB. Free memory was 153.4MB in the beginning and 152.5MB in the end (delta: 950.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 INFO L158 Benchmark]: RCFGBuilder took 192.07ms. Allocated memory is still 196.1MB. Free memory was 152.3MB in the beginning and 143.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 INFO L158 Benchmark]: TraceAbstraction took 882229.61ms. Allocated memory was 196.1MB in the beginning and 859.8MB in the end (delta: 663.7MB). Free memory was 142.9MB in the beginning and 517.4MB in the end (delta: -374.5MB). Peak memory consumption was 740.2MB. Max. memory is 8.0GB. [2022-02-11 01:27:45,736 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 0.12ms. Allocated memory is still 196.1MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.62ms. Allocated memory is still 196.1MB. Free memory was 154.9MB in the beginning and 153.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.72ms. Allocated memory is still 196.1MB. Free memory was 153.4MB in the beginning and 152.5MB in the end (delta: 950.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 192.07ms. Allocated memory is still 196.1MB. Free memory was 152.3MB in the beginning and 143.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 882229.61ms. Allocated memory was 196.1MB in the beginning and 859.8MB in the end (delta: 663.7MB). Free memory was 142.9MB in the beginning and 517.4MB in the end (delta: -374.5MB). Peak memory consumption was 740.2MB. 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: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 0ms.. - TimeoutResultAtElement [Line: 53]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 0ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 0ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 882.2s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.8s, AutomataDifference: 303.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48384 SdHoareTripleChecker+Valid, 73.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48384 mSDsluCounter, 41233 SdHoareTripleChecker+Invalid, 62.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14222 IncrementalHoareTripleChecker+Unchecked, 69252 mSDsCounter, 11607 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 161157 IncrementalHoareTripleChecker+Invalid, 186986 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11607 mSolverCounterUnsat, 3408 mSDtfsCounter, 161157 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11742 GetRequests, 4083 SyntacticMatches, 297 SemanticMatches, 7362 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 340143 ImplicationChecksByTransitivity, 239.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8034occurred in iteration=95, InterpolantAutomatonStates: 6675, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.1s AutomataMinimizationTime, 103 MinimizatonAttempts, 388397 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 55.8s InterpolantComputationTime, 5379 NumberOfCodeBlocks, 5376 NumberOfCodeBlocksAsserted, 305 NumberOfCheckSat, 7693 ConstructedInterpolants, 83 QuantifiedInterpolants, 88567 SizeOfPredicates, 943 NumberOfNonLiveVariables, 5860 ConjunctsInSsa, 1342 ConjunctsInUnsatCore, 293 InterpolantComputations, 9 PerfectInterpolantSequences, 320/1579 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