/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:09:13,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:09:13,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:09:13,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:09:13,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:09:13,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:09:13,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:09:13,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:09:13,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:09:13,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:09:13,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:09:13,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:09:13,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:09:13,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:09:13,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:09:13,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:09:13,944 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:09:13,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:09:13,944 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:09:13,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:09:13,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:09:13,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:09:13,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:09:13,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:09:14,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:09:14,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:09:14,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:09:14,149 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:09:14,150 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:09:14,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2022-03-15 16:09:14,151 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2022-03-15 16:09:14,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:09:14,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:09:14,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:09:14,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:09:14,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:09:14,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,200 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:09:14,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:09:14,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:09:14,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:09:14,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:09:14,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:09:14,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:09:14,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:09:14,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:09:14,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/1) ... [2022-03-15 16:09:14,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:09:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:14,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:09:14,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:09:14,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:09:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:09:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:09:14,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:09:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:09:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:09:14,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:09:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:09:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:09:14,271 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:09:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:09:14,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:09:14,272 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 16:09:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 16:09:14,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 16:09:14,273 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:09:14,305 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:09:14,306 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:09:14,401 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:09:14,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:09:14,414 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:09:14,416 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:09:14 BoogieIcfgContainer [2022-03-15 16:09:14,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:09:14,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:09:14,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:09:14,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:09:14,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:09:14" (1/2) ... [2022-03-15 16:09:14,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174788c and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:09:14, skipping insertion in model container [2022-03-15 16:09:14,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:09:14" (2/2) ... [2022-03-15 16:09:14,432 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2022-03-15 16:09:14,435 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:09:14,436 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:09:14,436 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:09:14,436 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:09:14,497 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 16:09:14,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:09:14,538 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:09:14,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-15 16:09:14,557 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2022-03-15 16:09:14,622 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:09:14,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:14,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:14,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1717712671, now seen corresponding path program 1 times [2022-03-15 16:09:14,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:14,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537546703] [2022-03-15 16:09:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:14,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:14,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537546703] [2022-03-15 16:09:14,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537546703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:14,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:14,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:09:14,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897376617] [2022-03-15 16:09:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:14,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:09:14,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:09:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:09:14,845 INFO L87 Difference]: Start difference. First operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:14,984 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2022-03-15 16:09:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:09:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:09:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,006 INFO L225 Difference]: With dead ends: 1267 [2022-03-15 16:09:15,006 INFO L226 Difference]: Without dead ends: 1056 [2022-03-15 16:09:15,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:09:15,010 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-15 16:09:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2022-03-15 16:09:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2022-03-15 16:09:15,096 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2022-03-15 16:09:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:15,097 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2022-03-15 16:09:15,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2022-03-15 16:09:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:15,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:15,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:09:15,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -389763933, now seen corresponding path program 1 times [2022-03-15 16:09:15,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:15,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056880189] [2022-03-15 16:09:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:15,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056880189] [2022-03-15 16:09:15,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056880189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:15,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:15,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:09:15,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310954624] [2022-03-15 16:09:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:15,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:09:15,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:09:15,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:09:15,175 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:15,343 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2022-03-15 16:09:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:09:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,351 INFO L225 Difference]: With dead ends: 1405 [2022-03-15 16:09:15,352 INFO L226 Difference]: Without dead ends: 1369 [2022-03-15 16:09:15,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:15,359 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-15 16:09:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2022-03-15 16:09:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2022-03-15 16:09:15,400 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2022-03-15 16:09:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:15,400 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2022-03-15 16:09:15,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2022-03-15 16:09:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:15,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:15,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:15,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:09:15,405 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1011514275, now seen corresponding path program 1 times [2022-03-15 16:09:15,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:15,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642594057] [2022-03-15 16:09:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:15,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:15,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642594057] [2022-03-15 16:09:15,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642594057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:15,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:15,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:09:15,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382651905] [2022-03-15 16:09:15,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:15,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:09:15,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:09:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:09:15,513 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:15,640 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2022-03-15 16:09:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:09:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,661 INFO L225 Difference]: With dead ends: 1359 [2022-03-15 16:09:15,661 INFO L226 Difference]: Without dead ends: 1327 [2022-03-15 16:09:15,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:09:15,666 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 63 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-03-15 16:09:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2022-03-15 16:09:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2022-03-15 16:09:15,689 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2022-03-15 16:09:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:15,689 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2022-03-15 16:09:15,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2022-03-15 16:09:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:15,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:15,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:15,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:09:15,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2122504637, now seen corresponding path program 2 times [2022-03-15 16:09:15,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:15,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634352761] [2022-03-15 16:09:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:15,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634352761] [2022-03-15 16:09:15,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634352761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:15,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:15,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:09:15,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606457783] [2022-03-15 16:09:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:15,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:09:15,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:09:15,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:09:15,751 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:15,829 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2022-03-15 16:09:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:09:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,836 INFO L225 Difference]: With dead ends: 1126 [2022-03-15 16:09:15,836 INFO L226 Difference]: Without dead ends: 1044 [2022-03-15 16:09:15,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:09:15,839 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-03-15 16:09:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2022-03-15 16:09:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2022-03-15 16:09:15,865 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2022-03-15 16:09:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:15,865 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2022-03-15 16:09:15,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2022-03-15 16:09:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:15,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:15,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:15,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:09:15,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1405271609, now seen corresponding path program 2 times [2022-03-15 16:09:15,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:15,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959939839] [2022-03-15 16:09:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:15,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959939839] [2022-03-15 16:09:15,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959939839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:15,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:15,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:09:15,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665502695] [2022-03-15 16:09:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:15,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:09:15,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:09:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:09:15,924 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:15,983 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2022-03-15 16:09:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:09:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,991 INFO L225 Difference]: With dead ends: 1296 [2022-03-15 16:09:15,991 INFO L226 Difference]: Without dead ends: 1276 [2022-03-15 16:09:15,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:09:15,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-03-15 16:09:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2022-03-15 16:09:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2022-03-15 16:09:16,021 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2022-03-15 16:09:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:16,021 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2022-03-15 16:09:16,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2022-03-15 16:09:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:16,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:16,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:16,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:09:16,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 909052359, now seen corresponding path program 3 times [2022-03-15 16:09:16,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:16,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263738567] [2022-03-15 16:09:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:16,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:16,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263738567] [2022-03-15 16:09:16,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263738567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:16,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:16,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:09:16,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984059295] [2022-03-15 16:09:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:09:16,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:09:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:09:16,105 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:16,209 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2022-03-15 16:09:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:09:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:16,219 INFO L225 Difference]: With dead ends: 1772 [2022-03-15 16:09:16,219 INFO L226 Difference]: Without dead ends: 1752 [2022-03-15 16:09:16,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:16,220 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:16,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 61 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-03-15 16:09:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2022-03-15 16:09:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2022-03-15 16:09:16,251 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2022-03-15 16:09:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2022-03-15 16:09:16,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2022-03-15 16:09:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:09:16,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:16,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 16:09:16,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash -669560377, now seen corresponding path program 4 times [2022-03-15 16:09:16,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:16,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674853028] [2022-03-15 16:09:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:16,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674853028] [2022-03-15 16:09:16,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674853028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:16,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:16,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:09:16,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001341965] [2022-03-15 16:09:16,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:09:16,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:09:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:09:16,320 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:16,383 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2022-03-15 16:09:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:09:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:09:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:16,389 INFO L225 Difference]: With dead ends: 1137 [2022-03-15 16:09:16,389 INFO L226 Difference]: Without dead ends: 1137 [2022-03-15 16:09:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:09:16,390 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 40 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-15 16:09:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2022-03-15 16:09:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2022-03-15 16:09:16,415 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2022-03-15 16:09:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:16,415 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2022-03-15 16:09:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2022-03-15 16:09:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:09:16,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:16,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:16,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 16:09:16,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 167752897, now seen corresponding path program 1 times [2022-03-15 16:09:16,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:16,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110983793] [2022-03-15 16:09:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:16,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:16,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110983793] [2022-03-15 16:09:16,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110983793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:16,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781874235] [2022-03-15 16:09:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:16,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:16,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:09:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:09:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781874235] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:16,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:09:16,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2022-03-15 16:09:16,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729155508] [2022-03-15 16:09:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:16,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:09:16,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:09:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:09:16,783 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:16,873 INFO L93 Difference]: Finished difference Result 1587 states and 5894 transitions. [2022-03-15 16:09:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:09:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:09:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:16,881 INFO L225 Difference]: With dead ends: 1587 [2022-03-15 16:09:16,881 INFO L226 Difference]: Without dead ends: 1587 [2022-03-15 16:09:16,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:09:16,882 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:16,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-03-15 16:09:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1027. [2022-03-15 16:09:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2022-03-15 16:09:16,911 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2022-03-15 16:09:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2022-03-15 16:09:16,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2022-03-15 16:09:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:09:16,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:16,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:16,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:17,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:17,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1812385345, now seen corresponding path program 2 times [2022-03-15 16:09:17,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:17,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017586580] [2022-03-15 16:09:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:17,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017586580] [2022-03-15 16:09:17,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017586580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:17,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:17,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:09:17,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677544040] [2022-03-15 16:09:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:17,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:09:17,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:09:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:09:17,177 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:17,226 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2022-03-15 16:09:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:09:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:09:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:17,232 INFO L225 Difference]: With dead ends: 1113 [2022-03-15 16:09:17,232 INFO L226 Difference]: Without dead ends: 1113 [2022-03-15 16:09:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:09:17,233 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:17,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-03-15 16:09:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2022-03-15 16:09:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2022-03-15 16:09:17,254 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2022-03-15 16:09:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:17,254 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2022-03-15 16:09:17,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2022-03-15 16:09:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:17,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:17,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:17,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 16:09:17,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1458704197, now seen corresponding path program 1 times [2022-03-15 16:09:17,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:17,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456584094] [2022-03-15 16:09:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:17,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:17,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456584094] [2022-03-15 16:09:17,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456584094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:17,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021273252] [2022-03-15 16:09:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:17,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:17,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:17,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:09:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:09:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021273252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:17,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:17,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 16:09:17,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178442651] [2022-03-15 16:09:17,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:09:17,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:09:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:09:17,470 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:17,547 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2022-03-15 16:09:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:09:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 31 [2022-03-15 16:09:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:17,554 INFO L225 Difference]: With dead ends: 1404 [2022-03-15 16:09:17,554 INFO L226 Difference]: Without dead ends: 1404 [2022-03-15 16:09:17,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:09:17,555 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:17,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 110 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-15 16:09:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2022-03-15 16:09:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2022-03-15 16:09:17,578 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2022-03-15 16:09:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:17,578 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2022-03-15 16:09:17,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2022-03-15 16:09:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:17,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:17,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:17,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:17,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:09:17,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1797271549, now seen corresponding path program 2 times [2022-03-15 16:09:17,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:17,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769952344] [2022-03-15 16:09:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:17,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769952344] [2022-03-15 16:09:17,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769952344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:17,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260365860] [2022-03-15 16:09:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:17,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:17,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:17,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:09:17,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:09:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:17,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 16:09:17,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260365860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:17,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 16:09:17,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-03-15 16:09:17,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098745273] [2022-03-15 16:09:17,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:17,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:09:17,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:09:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:09:17,938 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:17,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:17,971 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2022-03-15 16:09:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:09:17,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:17,985 INFO L225 Difference]: With dead ends: 1123 [2022-03-15 16:09:17,985 INFO L226 Difference]: Without dead ends: 1063 [2022-03-15 16:09:17,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:17,985 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:17,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-03-15 16:09:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2022-03-15 16:09:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2022-03-15 16:09:18,004 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2022-03-15 16:09:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2022-03-15 16:09:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2022-03-15 16:09:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 16:09:18,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:18,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:18,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:18,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:18,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:18,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1732934325, now seen corresponding path program 1 times [2022-03-15 16:09:18,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:18,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020331348] [2022-03-15 16:09:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:18,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:18,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020331348] [2022-03-15 16:09:18,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020331348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:18,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525801941] [2022-03-15 16:09:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:18,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:09:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:09:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:18,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:18,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525801941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:18,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:18,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-03-15 16:09:18,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22641135] [2022-03-15 16:09:18,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:09:18,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:09:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:09:18,570 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:18,712 INFO L93 Difference]: Finished difference Result 4899 states and 18451 transitions. [2022-03-15 16:09:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:09:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 16:09:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:18,727 INFO L225 Difference]: With dead ends: 4899 [2022-03-15 16:09:18,727 INFO L226 Difference]: Without dead ends: 4461 [2022-03-15 16:09:18,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:09:18,728 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 226 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:18,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 427 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2022-03-15 16:09:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3248. [2022-03-15 16:09:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.041576840160148) internal successors, (13123), 3247 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13123 transitions. [2022-03-15 16:09:18,835 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13123 transitions. Word has length 33 [2022-03-15 16:09:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:18,836 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13123 transitions. [2022-03-15 16:09:18,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13123 transitions. [2022-03-15 16:09:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:18,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:18,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:18,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:19,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:19,059 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -460853709, now seen corresponding path program 2 times [2022-03-15 16:09:19,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:19,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162047389] [2022-03-15 16:09:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:19,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:19,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162047389] [2022-03-15 16:09:19,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162047389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:19,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335113] [2022-03-15 16:09:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:19,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:19,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:09:19,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:09:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:19,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:19,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:19,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:19,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:09:19,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150596518] [2022-03-15 16:09:19,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:09:19,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:09:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:09:19,369 INFO L87 Difference]: Start difference. First operand 3248 states and 13123 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:19,954 INFO L93 Difference]: Finished difference Result 11964 states and 47490 transitions. [2022-03-15 16:09:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:09:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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 35 [2022-03-15 16:09:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:19,998 INFO L225 Difference]: With dead ends: 11964 [2022-03-15 16:09:19,998 INFO L226 Difference]: Without dead ends: 11922 [2022-03-15 16:09:19,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:09:19,999 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:19,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 223 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:09:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2022-03-15 16:09:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 4644. [2022-03-15 16:09:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.164548783114365) internal successors, (19336), 4643 states have internal predecessors, (19336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 19336 transitions. [2022-03-15 16:09:20,171 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 19336 transitions. Word has length 35 [2022-03-15 16:09:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:20,171 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 19336 transitions. [2022-03-15 16:09:20,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 19336 transitions. [2022-03-15 16:09:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:20,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:20,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:20,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:09:20,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1368524919, now seen corresponding path program 3 times [2022-03-15 16:09:20,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:20,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571768635] [2022-03-15 16:09:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:20,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:20,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:20,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571768635] [2022-03-15 16:09:20,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571768635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:20,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888898168] [2022-03-15 16:09:20,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:20,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:20,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:20,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:09:20,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:09:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:09:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:20,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:20,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888898168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:20,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:20,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-15 16:09:20,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179035384] [2022-03-15 16:09:20,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:20,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:09:20,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:09:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:09:20,762 INFO L87 Difference]: Start difference. First operand 4644 states and 19336 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:21,502 INFO L93 Difference]: Finished difference Result 26150 states and 109813 transitions. [2022-03-15 16:09:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:09:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:09:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:21,693 INFO L225 Difference]: With dead ends: 26150 [2022-03-15 16:09:21,693 INFO L226 Difference]: Without dead ends: 25754 [2022-03-15 16:09:21,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=1725, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:09:21,694 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1022 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:21,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 128 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:09:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2022-03-15 16:09:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 12160. [2022-03-15 16:09:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12160 states, 12159 states have (on average 4.609260629986019) internal successors, (56044), 12159 states have internal predecessors, (56044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12160 states to 12160 states and 56044 transitions. [2022-03-15 16:09:22,312 INFO L78 Accepts]: Start accepts. Automaton has 12160 states and 56044 transitions. Word has length 35 [2022-03-15 16:09:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:22,312 INFO L470 AbstractCegarLoop]: Abstraction has 12160 states and 56044 transitions. [2022-03-15 16:09:22,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 12160 states and 56044 transitions. [2022-03-15 16:09:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:22,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:22,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:22,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 16:09:22,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:22,624 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1030007943, now seen corresponding path program 4 times [2022-03-15 16:09:22,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:22,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354711907] [2022-03-15 16:09:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:22,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:22,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354711907] [2022-03-15 16:09:22,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354711907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:09:22,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:09:22,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:09:22,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591867201] [2022-03-15 16:09:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:09:22,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:09:22,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:09:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:09:22,646 INFO L87 Difference]: Start difference. First operand 12160 states and 56044 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:22,807 INFO L93 Difference]: Finished difference Result 22772 states and 104836 transitions. [2022-03-15 16:09:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:09:22,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:09:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:23,001 INFO L225 Difference]: With dead ends: 22772 [2022-03-15 16:09:23,002 INFO L226 Difference]: Without dead ends: 22430 [2022-03-15 16:09:23,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:09:23,004 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:23,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22430 states. [2022-03-15 16:09:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22430 to 17577. [2022-03-15 16:09:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17577 states, 17576 states have (on average 4.741124260355029) internal successors, (83330), 17576 states have internal predecessors, (83330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17577 states to 17577 states and 83330 transitions. [2022-03-15 16:09:23,744 INFO L78 Accepts]: Start accepts. Automaton has 17577 states and 83330 transitions. Word has length 35 [2022-03-15 16:09:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:23,744 INFO L470 AbstractCegarLoop]: Abstraction has 17577 states and 83330 transitions. [2022-03-15 16:09:23,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17577 states and 83330 transitions. [2022-03-15 16:09:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:23,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:23,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:23,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-15 16:09:23,801 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash 36787659, now seen corresponding path program 5 times [2022-03-15 16:09:23,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:23,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683608212] [2022-03-15 16:09:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:23,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:23,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683608212] [2022-03-15 16:09:23,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683608212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:23,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219057598] [2022-03-15 16:09:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:23,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:23,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:23,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:09:23,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:09:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:09:23,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:23,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:23,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219057598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:23,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:23,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 16:09:23,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126681785] [2022-03-15 16:09:23,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:23,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:09:23,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:09:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:09:23,956 INFO L87 Difference]: Start difference. First operand 17577 states and 83330 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:24,252 INFO L93 Difference]: Finished difference Result 24288 states and 111523 transitions. [2022-03-15 16:09:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:09:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:09:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:24,345 INFO L225 Difference]: With dead ends: 24288 [2022-03-15 16:09:24,346 INFO L226 Difference]: Without dead ends: 23645 [2022-03-15 16:09:24,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:09:24,346 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:24,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23645 states. [2022-03-15 16:09:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23645 to 19099. [2022-03-15 16:09:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19099 states, 19098 states have (on average 4.717876217404964) internal successors, (90102), 19098 states have internal predecessors, (90102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19099 states to 19099 states and 90102 transitions. [2022-03-15 16:09:24,989 INFO L78 Accepts]: Start accepts. Automaton has 19099 states and 90102 transitions. Word has length 35 [2022-03-15 16:09:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:24,989 INFO L470 AbstractCegarLoop]: Abstraction has 19099 states and 90102 transitions. [2022-03-15 16:09:24,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 19099 states and 90102 transitions. [2022-03-15 16:09:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:25,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:25,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:25,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 16:09:25,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:25,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash -511502213, now seen corresponding path program 6 times [2022-03-15 16:09:25,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:25,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748711962] [2022-03-15 16:09:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:25,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:25,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748711962] [2022-03-15 16:09:25,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748711962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907038555] [2022-03-15 16:09:25,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:25,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:25,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:25,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:09:25,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:09:25,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:25,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:25,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:25,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907038555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:25,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:25,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-03-15 16:09:25,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19243444] [2022-03-15 16:09:25,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:25,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:09:25,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:25,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:09:25,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:09:25,520 INFO L87 Difference]: Start difference. First operand 19099 states and 90102 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:27,373 INFO L93 Difference]: Finished difference Result 61607 states and 268988 transitions. [2022-03-15 16:09:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:09:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:09:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:27,813 INFO L225 Difference]: With dead ends: 61607 [2022-03-15 16:09:27,813 INFO L226 Difference]: Without dead ends: 59661 [2022-03-15 16:09:27,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=3884, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:09:27,814 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 647 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:27,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 282 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:09:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59661 states. [2022-03-15 16:09:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59661 to 37618. [2022-03-15 16:09:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37618 states, 37617 states have (on average 4.593694340324853) internal successors, (172801), 37617 states have internal predecessors, (172801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37618 states to 37618 states and 172801 transitions. [2022-03-15 16:09:29,354 INFO L78 Accepts]: Start accepts. Automaton has 37618 states and 172801 transitions. Word has length 35 [2022-03-15 16:09:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:29,355 INFO L470 AbstractCegarLoop]: Abstraction has 37618 states and 172801 transitions. [2022-03-15 16:09:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37618 states and 172801 transitions. [2022-03-15 16:09:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:29,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:29,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:29,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:29,647 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,SelfDestructingSolverStorable16 [2022-03-15 16:09:29,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1647323397, now seen corresponding path program 7 times [2022-03-15 16:09:29,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:29,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615737378] [2022-03-15 16:09:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:29,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:29,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615737378] [2022-03-15 16:09:29,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615737378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:29,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442755278] [2022-03-15 16:09:29,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:29,699 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:29,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:09:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:29,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:09:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:29,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442755278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:29,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:29,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-15 16:09:29,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614963690] [2022-03-15 16:09:29,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:09:29,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:09:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:09:29,932 INFO L87 Difference]: Start difference. First operand 37618 states and 172801 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:31,685 INFO L93 Difference]: Finished difference Result 107350 states and 486163 transitions. [2022-03-15 16:09:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:09:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 35 [2022-03-15 16:09:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:32,234 INFO L225 Difference]: With dead ends: 107350 [2022-03-15 16:09:32,235 INFO L226 Difference]: Without dead ends: 105030 [2022-03-15 16:09:32,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:09:32,235 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 615 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:32,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 165 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:09:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105030 states. [2022-03-15 16:09:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105030 to 65463. [2022-03-15 16:09:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65463 states, 65462 states have (on average 4.7165531147841495) internal successors, (308755), 65462 states have internal predecessors, (308755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65463 states to 65463 states and 308755 transitions. [2022-03-15 16:09:35,143 INFO L78 Accepts]: Start accepts. Automaton has 65463 states and 308755 transitions. Word has length 35 [2022-03-15 16:09:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:35,143 INFO L470 AbstractCegarLoop]: Abstraction has 65463 states and 308755 transitions. [2022-03-15 16:09:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 65463 states and 308755 transitions. [2022-03-15 16:09:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:09:35,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:35,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:35,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:35,779 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,SelfDestructingSolverStorable17 [2022-03-15 16:09:35,779 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1868618369, now seen corresponding path program 8 times [2022-03-15 16:09:35,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:35,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30095597] [2022-03-15 16:09:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:35,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:35,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30095597] [2022-03-15 16:09:35,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30095597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:35,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807025102] [2022-03-15 16:09:35,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:35,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:35,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:35,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:35,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:09:35,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:35,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:09:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:36,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807025102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:36,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:36,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-15 16:09:36,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648493553] [2022-03-15 16:09:36,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:36,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:09:36,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:09:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:09:36,155 INFO L87 Difference]: Start difference. First operand 65463 states and 308755 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:37,923 INFO L93 Difference]: Finished difference Result 131125 states and 590675 transitions. [2022-03-15 16:09:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:09:37,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:09:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:38,857 INFO L225 Difference]: With dead ends: 131125 [2022-03-15 16:09:38,858 INFO L226 Difference]: Without dead ends: 130939 [2022-03-15 16:09:38,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:09:38,858 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 602 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:38,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 207 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:09:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130939 states. [2022-03-15 16:09:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130939 to 84261. [2022-03-15 16:09:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84261 states, 84260 states have (on average 4.7022549252314265) internal successors, (396212), 84260 states have internal predecessors, (396212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84261 states to 84261 states and 396212 transitions. [2022-03-15 16:09:42,605 INFO L78 Accepts]: Start accepts. Automaton has 84261 states and 396212 transitions. Word has length 35 [2022-03-15 16:09:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:42,605 INFO L470 AbstractCegarLoop]: Abstraction has 84261 states and 396212 transitions. [2022-03-15 16:09:42,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 84261 states and 396212 transitions. [2022-03-15 16:09:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:09:42,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:42,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:42,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:43,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:43,010 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1914606333, now seen corresponding path program 9 times [2022-03-15 16:09:43,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:43,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523465746] [2022-03-15 16:09:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:43,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:43,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523465746] [2022-03-15 16:09:43,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523465746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:43,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007131310] [2022-03-15 16:09:43,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:43,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:43,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:09:43,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:09:43,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:43,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007131310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:43,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:43,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 9 [2022-03-15 16:09:43,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640202932] [2022-03-15 16:09:43,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:43,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:09:43,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:09:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:43,517 INFO L87 Difference]: Start difference. First operand 84261 states and 396212 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:45,096 INFO L93 Difference]: Finished difference Result 132476 states and 608383 transitions. [2022-03-15 16:09:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:09:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 37 [2022-03-15 16:09:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:45,831 INFO L225 Difference]: With dead ends: 132476 [2022-03-15 16:09:45,831 INFO L226 Difference]: Without dead ends: 131442 [2022-03-15 16:09:45,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:09:45,831 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 219 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:45,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131442 states. [2022-03-15 16:09:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131442 to 101762. [2022-03-15 16:09:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101762 states, 101761 states have (on average 4.729984964770393) internal successors, (481328), 101761 states have internal predecessors, (481328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101762 states to 101762 states and 481328 transitions. [2022-03-15 16:09:50,257 INFO L78 Accepts]: Start accepts. Automaton has 101762 states and 481328 transitions. Word has length 37 [2022-03-15 16:09:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 101762 states and 481328 transitions. [2022-03-15 16:09:50,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 101762 states and 481328 transitions. [2022-03-15 16:09:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:09:50,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:50,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:50,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-15 16:09:50,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:50,704 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:09:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 119071037, now seen corresponding path program 10 times [2022-03-15 16:09:50,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:50,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783989684] [2022-03-15 16:09:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:50,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:50,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:50,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783989684] [2022-03-15 16:09:50,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783989684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:50,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980347542] [2022-03-15 16:09:50,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:50,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:50,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:09:50,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:09:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:50,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:51,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980347542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:51,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:51,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:09:51,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050205478] [2022-03-15 16:09:51,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:51,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:09:51,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:09:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:09:51,064 INFO L87 Difference]: Start difference. First operand 101762 states and 481328 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:54,194 INFO L93 Difference]: Finished difference Result 225429 states and 1055743 transitions. [2022-03-15 16:09:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:09:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:09:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:56,042 INFO L225 Difference]: With dead ends: 225429 [2022-03-15 16:09:56,042 INFO L226 Difference]: Without dead ends: 224048 [2022-03-15 16:09:56,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:56,044 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 580 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:56,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 191 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:09:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224048 states. [2022-03-15 16:10:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224048 to 175351. [2022-03-15 16:10:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175351 states, 175350 states have (on average 4.8957627601938976) internal successors, (858472), 175350 states have internal predecessors, (858472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175351 states to 175351 states and 858472 transitions. [2022-03-15 16:10:05,135 INFO L78 Accepts]: Start accepts. Automaton has 175351 states and 858472 transitions. Word has length 37 [2022-03-15 16:10:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:05,135 INFO L470 AbstractCegarLoop]: Abstraction has 175351 states and 858472 transitions. [2022-03-15 16:10:05,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 175351 states and 858472 transitions. [2022-03-15 16:10:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:10:05,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:05,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:05,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:06,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-15 16:10:06,118 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:10:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 862530109, now seen corresponding path program 11 times [2022-03-15 16:10:06,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:06,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804363618] [2022-03-15 16:10:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:10:06,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:06,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804363618] [2022-03-15 16:10:06,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804363618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:06,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139532374] [2022-03-15 16:10:06,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:10:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:06,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:06,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:10:06,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:10:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:10:06,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:06,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:06,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139532374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:06,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:06,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 16:10:06,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413137401] [2022-03-15 16:10:06,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:06,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:10:06,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:10:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:10:06,824 INFO L87 Difference]: Start difference. First operand 175351 states and 858472 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:13,438 INFO L93 Difference]: Finished difference Result 455289 states and 2152646 transitions. [2022-03-15 16:10:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:10:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:10:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:17,546 INFO L225 Difference]: With dead ends: 455289 [2022-03-15 16:10:17,547 INFO L226 Difference]: Without dead ends: 445874 [2022-03-15 16:10:17,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=3276, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:10:17,548 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 537 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:17,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 357 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:10:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445874 states. [2022-03-15 16:10:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445874 to 322452. [2022-03-15 16:10:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322452 states, 322451 states have (on average 4.898114752318957) internal successors, (1579402), 322451 states have internal predecessors, (1579402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322452 states to 322452 states and 1579402 transitions. [2022-03-15 16:10:39,819 INFO L78 Accepts]: Start accepts. Automaton has 322452 states and 1579402 transitions. Word has length 37 [2022-03-15 16:10:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:39,819 INFO L470 AbstractCegarLoop]: Abstraction has 322452 states and 1579402 transitions. [2022-03-15 16:10:39,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 322452 states and 1579402 transitions. [2022-03-15 16:10:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:10:41,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:41,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:41,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-15 16:10:41,716 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,SelfDestructingSolverStorable21 [2022-03-15 16:10:41,716 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:10:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1700987573, now seen corresponding path program 12 times [2022-03-15 16:10:41,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:41,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769974998] [2022-03-15 16:10:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:41,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:10:41,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:41,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769974998] [2022-03-15 16:10:41,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769974998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:41,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912129202] [2022-03-15 16:10:41,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:41,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:41,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:41,788 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:41,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:10:41,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:10:41,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:41,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:10:41,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:42,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:42,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912129202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:42,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:42,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 17 [2022-03-15 16:10:42,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538103708] [2022-03-15 16:10:42,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:42,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:10:42,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:10:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:10:42,210 INFO L87 Difference]: Start difference. First operand 322452 states and 1579402 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:50,633 INFO L93 Difference]: Finished difference Result 436832 states and 2113397 transitions. [2022-03-15 16:10:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:10:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:10:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:57,320 INFO L225 Difference]: With dead ends: 436832 [2022-03-15 16:10:57,320 INFO L226 Difference]: Without dead ends: 434894 [2022-03-15 16:10:57,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1054, Invalid=3106, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:10:57,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 427 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:57,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 251 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:10:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434894 states. [2022-03-15 16:11:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434894 to 384064. [2022-03-15 16:11:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384064 states, 384063 states have (on average 4.9422724917526555) internal successors, (1898144), 384063 states have internal predecessors, (1898144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384064 states to 384064 states and 1898144 transitions. [2022-03-15 16:11:19,811 INFO L78 Accepts]: Start accepts. Automaton has 384064 states and 1898144 transitions. Word has length 37 [2022-03-15 16:11:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:19,811 INFO L470 AbstractCegarLoop]: Abstraction has 384064 states and 1898144 transitions. [2022-03-15 16:11:19,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 384064 states and 1898144 transitions. [2022-03-15 16:11:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:11:22,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:22,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:22,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:22,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:22,667 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:11:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash 942207807, now seen corresponding path program 13 times [2022-03-15 16:11:22,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:22,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393330160] [2022-03-15 16:11:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 16:11:22,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:22,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393330160] [2022-03-15 16:11:22,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393330160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:22,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824418320] [2022-03-15 16:11:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:22,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:22,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:11:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:11:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:23,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824418320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:23,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:23,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2022-03-15 16:11:23,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340307883] [2022-03-15 16:11:23,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:11:23,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:11:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:11:23,175 INFO L87 Difference]: Start difference. First operand 384064 states and 1898144 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)