/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:23:44,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:23:44,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:23:44,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:23:44,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 12:23:44,618 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:23:44,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:23:44,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:23:44,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:23:44,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:23:44,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:23:44,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:23:44,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:23:44,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:23:44,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:23:44,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:23:44,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:23:44,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:23:44,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:23:44,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:23:44,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:23:44,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:23:44,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:23:44,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:23:44,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:23:44,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:23:44,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:23:44,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:23:44,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:23:44,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:23:44,816 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:23:44,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-18 12:23:44,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d8d3b25/e51c1f171864463fb611e56dd09def8d/FLAG031f4f4a8 [2022-03-18 12:23:45,226 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:23:45,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-18 12:23:45,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d8d3b25/e51c1f171864463fb611e56dd09def8d/FLAG031f4f4a8 [2022-03-18 12:23:45,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d8d3b25/e51c1f171864463fb611e56dd09def8d [2022-03-18 12:23:45,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:23:45,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:23:45,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:23:45,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:23:45,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:23:45,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f0b33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45, skipping insertion in model container [2022-03-18 12:23:45,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:23:45,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:23:45,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-18 12:23:45,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:23:45,430 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:23:45,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-18 12:23:45,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:23:45,453 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:23:45,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45 WrapperNode [2022-03-18 12:23:45,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:23:45,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:23:45,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:23:45,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:23:45,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:23:45,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:23:45,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:23:45,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:23:45,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (1/1) ... [2022-03-18 12:23:45,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:23:45,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:45,512 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) [2022-03-18 12:23:45,529 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 [2022-03-18 12:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:23:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:23:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:23:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:23:45,588 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:23:45,589 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:23:45,680 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:23:45,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:23:45,683 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 12:23:45,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:23:45 BoogieIcfgContainer [2022-03-18 12:23:45,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:23:45,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:23:45,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:23:45,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:23:45,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:23:45" (1/3) ... [2022-03-18 12:23:45,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45572864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:23:45, skipping insertion in model container [2022-03-18 12:23:45,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:23:45" (2/3) ... [2022-03-18 12:23:45,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45572864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:23:45, skipping insertion in model container [2022-03-18 12:23:45,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:23:45" (3/3) ... [2022-03-18 12:23:45,702 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2022-03-18 12:23:45,705 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:23:45,705 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:23:45,736 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:23:45,741 INFO L340 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=PETRI_NET, 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 [2022-03-18 12:23:45,741 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:23:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 12:23:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 12:23:45,754 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:45,755 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:45,756 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1677248157, now seen corresponding path program 1 times [2022-03-18 12:23:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:45,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349723480] [2022-03-18 12:23:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:45,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:45,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349723480] [2022-03-18 12:23:45,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349723480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:45,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:23:45,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:23:45,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646640544] [2022-03-18 12:23:45,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:45,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:23:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:23:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:23:45,991 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:46,056 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2022-03-18 12:23:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:23:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 12:23:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:46,061 INFO L225 Difference]: With dead ends: 40 [2022-03-18 12:23:46,061 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 12:23:46,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:23:46,072 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:46,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 12:23:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-18 12:23:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 12:23:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-18 12:23:46,098 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-03-18 12:23:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:46,098 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-18 12:23:46,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-18 12:23:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:23:46,099 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:46,100 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:46,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:23:46,100 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -946078686, now seen corresponding path program 1 times [2022-03-18 12:23:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795202539] [2022-03-18 12:23:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:46,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795202539] [2022-03-18 12:23:46,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795202539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405805845] [2022-03-18 12:23:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:46,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:46,190 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) [2022-03-18 12:23:46,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:23:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-18 12:23:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:23:46,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:23:46,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405805845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:46,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 12:23:46,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-18 12:23:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384847315] [2022-03-18 12:23:46,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:46,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 12:23:46,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 12:23:46,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:23:46,308 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:46,330 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-03-18 12:23:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 12:23:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 12:23:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:46,332 INFO L225 Difference]: With dead ends: 37 [2022-03-18 12:23:46,332 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 12:23:46,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:23:46,333 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:46,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 12:23:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-18 12:23:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 12:23:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 12:23:46,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2022-03-18 12:23:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:46,342 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 12:23:46,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 12:23:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:23:46,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:46,343 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:46,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:46,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:46,552 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -944231644, now seen corresponding path program 1 times [2022-03-18 12:23:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:46,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009430506] [2022-03-18 12:23:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:46,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009430506] [2022-03-18 12:23:46,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009430506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:46,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143872687] [2022-03-18 12:23:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:46,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:46,640 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) [2022-03-18 12:23:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:23:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 12:23:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143872687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:46,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 12:23:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022694090] [2022-03-18 12:23:46,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:46,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 12:23:46,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 12:23:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 12:23:46,797 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:46,858 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-18 12:23:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:23:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 12:23:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:46,860 INFO L225 Difference]: With dead ends: 46 [2022-03-18 12:23:46,860 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 12:23:46,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 12:23:46,863 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:46,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 12:23:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-18 12:23:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 12:23:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-18 12:23:46,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-03-18 12:23:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:46,872 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-18 12:23:46,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-18 12:23:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:23:46,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:46,873 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:46,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:47,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 12:23:47,092 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -19048539, now seen corresponding path program 2 times [2022-03-18 12:23:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:47,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23352062] [2022-03-18 12:23:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:47,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:23:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23352062] [2022-03-18 12:23:47,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23352062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961994554] [2022-03-18 12:23:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:23:47,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:47,169 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) [2022-03-18 12:23:47,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:23:47,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:23:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 12:23:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:23:47,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:23:47,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961994554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:47,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:47,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-18 12:23:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619492410] [2022-03-18 12:23:47,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:47,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 12:23:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 12:23:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-18 12:23:47,341 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:47,551 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2022-03-18 12:23:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 12:23:47,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 12:23:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:47,552 INFO L225 Difference]: With dead ends: 117 [2022-03-18 12:23:47,553 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 12:23:47,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:23:47,554 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:47,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:23:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 12:23:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-03-18 12:23:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 66 states have internal predecessors, (85), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:23:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-03-18 12:23:47,570 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 26 [2022-03-18 12:23:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:47,570 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-03-18 12:23:47,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-03-18 12:23:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:23:47,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:47,571 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:47,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:47,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:47,772 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash -561595545, now seen corresponding path program 1 times [2022-03-18 12:23:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:47,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235433388] [2022-03-18 12:23:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:47,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:23:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:47,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235433388] [2022-03-18 12:23:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235433388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348724071] [2022-03-18 12:23:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:47,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:47,824 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) [2022-03-18 12:23:47,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:23:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 12:23:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:23:47,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:23:47,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348724071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:47,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 12:23:47,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-18 12:23:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155265321] [2022-03-18 12:23:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:47,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:23:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:23:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:23:47,910 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:47,977 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-03-18 12:23:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:23:47,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 12:23:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:47,980 INFO L225 Difference]: With dead ends: 205 [2022-03-18 12:23:47,980 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 12:23:47,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:23:47,981 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:47,981 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:23:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 12:23:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2022-03-18 12:23:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 91 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:23:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-18 12:23:47,991 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 26 [2022-03-18 12:23:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:47,991 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-18 12:23:47,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-18 12:23:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:23:47,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:47,992 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:48,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:48,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:48,199 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -303430107, now seen corresponding path program 2 times [2022-03-18 12:23:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366080927] [2022-03-18 12:23:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:48,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:48,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:48,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366080927] [2022-03-18 12:23:48,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366080927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:48,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434359745] [2022-03-18 12:23:48,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:23:48,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:48,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:48,267 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) [2022-03-18 12:23:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:23:48,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:23:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:48,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:23:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:48,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434359745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:48,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:48,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 12:23:48,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221323578] [2022-03-18 12:23:48,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:48,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 12:23:48,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 12:23:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:23:48,438 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:48,523 INFO L93 Difference]: Finished difference Result 329 states and 437 transitions. [2022-03-18 12:23:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 12:23:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 12:23:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:48,524 INFO L225 Difference]: With dead ends: 329 [2022-03-18 12:23:48,524 INFO L226 Difference]: Without dead ends: 235 [2022-03-18 12:23:48,525 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:23:48,525 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:48,526 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:23:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-18 12:23:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-03-18 12:23:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 198 states have (on average 1.2171717171717171) internal successors, (241), 199 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:23:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2022-03-18 12:23:48,547 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 26 [2022-03-18 12:23:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:48,547 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2022-03-18 12:23:48,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2022-03-18 12:23:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 12:23:48,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:48,548 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:48,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:48,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:48,765 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash 912885445, now seen corresponding path program 3 times [2022-03-18 12:23:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:48,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995348108] [2022-03-18 12:23:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995348108] [2022-03-18 12:23:48,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995348108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344326087] [2022-03-18 12:23:48,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:23:48,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:48,880 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) [2022-03-18 12:23:48,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 12:23:48,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:23:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:23:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-18 12:23:49,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:23:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344326087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:49,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 12:23:49,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-03-18 12:23:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010795596] [2022-03-18 12:23:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:49,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:23:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:23:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:23:49,218 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:49,266 INFO L93 Difference]: Finished difference Result 349 states and 411 transitions. [2022-03-18 12:23:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 12:23:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-18 12:23:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:49,267 INFO L225 Difference]: With dead ends: 349 [2022-03-18 12:23:49,267 INFO L226 Difference]: Without dead ends: 347 [2022-03-18 12:23:49,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-18 12:23:49,268 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:49,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-18 12:23:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-03-18 12:23:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 328 states have (on average 1.1859756097560976) internal successors, (389), 331 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:23:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 404 transitions. [2022-03-18 12:23:49,302 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 404 transitions. Word has length 44 [2022-03-18 12:23:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:49,303 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 404 transitions. [2022-03-18 12:23:49,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 404 transitions. [2022-03-18 12:23:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 12:23:49,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:49,309 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:49,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:49,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:49,523 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -218798013, now seen corresponding path program 1 times [2022-03-18 12:23:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:49,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194072492] [2022-03-18 12:23:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194072492] [2022-03-18 12:23:49,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194072492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208579738] [2022-03-18 12:23:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:49,637 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) [2022-03-18 12:23:49,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 12:23:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 12:23:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:49,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208579738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:49,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:49,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 12:23:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11312650] [2022-03-18 12:23:49,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:49,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:23:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:23:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:23:49,950 INFO L87 Difference]: Start difference. First operand 344 states and 404 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:50,068 INFO L93 Difference]: Finished difference Result 1004 states and 1301 transitions. [2022-03-18 12:23:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 12:23:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-18 12:23:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:50,071 INFO L225 Difference]: With dead ends: 1004 [2022-03-18 12:23:50,071 INFO L226 Difference]: Without dead ends: 778 [2022-03-18 12:23:50,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:23:50,073 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:50,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:23:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-18 12:23:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 704. [2022-03-18 12:23:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 688 states have (on average 1.1584302325581395) internal successors, (797), 691 states have internal predecessors, (797), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:23:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 812 transitions. [2022-03-18 12:23:50,097 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 812 transitions. Word has length 44 [2022-03-18 12:23:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:50,097 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 812 transitions. [2022-03-18 12:23:50,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 812 transitions. [2022-03-18 12:23:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 12:23:50,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:50,099 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:50,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:50,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:50,316 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash -120804733, now seen corresponding path program 2 times [2022-03-18 12:23:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118943881] [2022-03-18 12:23:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:50,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118943881] [2022-03-18 12:23:50,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118943881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020783417] [2022-03-18 12:23:50,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:23:50,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:50,588 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) [2022-03-18 12:23:50,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 12:23:50,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:23:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:50,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 12:23:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:50,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020783417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:51,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2022-03-18 12:23:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284645953] [2022-03-18 12:23:51,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:51,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 12:23:51,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 12:23:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 12:23:51,520 INFO L87 Difference]: Start difference. First operand 704 states and 812 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:53,721 INFO L93 Difference]: Finished difference Result 2412 states and 3167 transitions. [2022-03-18 12:23:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-18 12:23:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-18 12:23:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:53,728 INFO L225 Difference]: With dead ends: 2412 [2022-03-18 12:23:53,728 INFO L226 Difference]: Without dead ends: 1970 [2022-03-18 12:23:53,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6559, Invalid=14611, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 12:23:53,736 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 601 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:53,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 67 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:23:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-03-18 12:23:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1020. [2022-03-18 12:23:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1004 states have (on average 1.202191235059761) internal successors, (1207), 1007 states have internal predecessors, (1207), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:23:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1222 transitions. [2022-03-18 12:23:53,773 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1222 transitions. Word has length 80 [2022-03-18 12:23:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:53,774 INFO L478 AbstractCegarLoop]: Abstraction has 1020 states and 1222 transitions. [2022-03-18 12:23:53,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1222 transitions. [2022-03-18 12:23:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 12:23:53,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:53,778 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:53,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:53,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 12:23:53,995 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1231591194, now seen corresponding path program 1 times [2022-03-18 12:23:53,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:53,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036493891] [2022-03-18 12:23:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:54,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-18 12:23:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:54,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036493891] [2022-03-18 12:23:54,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036493891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:54,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:23:54,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:23:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61013511] [2022-03-18 12:23:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:54,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:23:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:23:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:23:54,078 INFO L87 Difference]: Start difference. First operand 1020 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:54,120 INFO L93 Difference]: Finished difference Result 1676 states and 2030 transitions. [2022-03-18 12:23:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:23:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-18 12:23:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:54,123 INFO L225 Difference]: With dead ends: 1676 [2022-03-18 12:23:54,123 INFO L226 Difference]: Without dead ends: 1031 [2022-03-18 12:23:54,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:23:54,125 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:54,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-03-18 12:23:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1016. [2022-03-18 12:23:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:23:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-18 12:23:54,169 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 149 [2022-03-18 12:23:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:54,169 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-18 12:23:54,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-18 12:23:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-18 12:23:54,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:54,171 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:54,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 12:23:54,171 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 687787779, now seen corresponding path program 3 times [2022-03-18 12:23:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836503178] [2022-03-18 12:23:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:54,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:23:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836503178] [2022-03-18 12:23:54,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836503178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420954272] [2022-03-18 12:23:54,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:23:54,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:54,967 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) [2022-03-18 12:23:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:23:55,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:23:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:23:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-18 12:23:55,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:23:55,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420954272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:23:55,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 12:23:55,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [50] total 57 [2022-03-18 12:23:55,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030387458] [2022-03-18 12:23:55,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:23:55,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:23:55,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:23:55,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1995, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 12:23:55,651 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:55,724 INFO L93 Difference]: Finished difference Result 1025 states and 1223 transitions. [2022-03-18 12:23:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 12:23:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-18 12:23:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:55,727 INFO L225 Difference]: With dead ends: 1025 [2022-03-18 12:23:55,727 INFO L226 Difference]: Without dead ends: 1023 [2022-03-18 12:23:55,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 12:23:55,729 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:55,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:23:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-03-18 12:23:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1016. [2022-03-18 12:23:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:23:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-18 12:23:55,756 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 152 [2022-03-18 12:23:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:55,757 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-18 12:23:55,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:23:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-18 12:23:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-18 12:23:55,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:55,760 INFO L500 BasicCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:55,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:55,979 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:55,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2002907996, now seen corresponding path program 1 times [2022-03-18 12:23:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:55,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439484793] [2022-03-18 12:23:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:56,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:56,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 12:23:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-18 12:23:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439484793] [2022-03-18 12:23:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439484793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333589144] [2022-03-18 12:23:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:56,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:56,778 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) [2022-03-18 12:23:56,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 12:23:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 12:23:56,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-03-18 12:23:57,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-18 12:23:59,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333589144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:59,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:59,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-18 12:23:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397171785] [2022-03-18 12:23:59,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:59,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 12:23:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 12:23:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 12:23:59,392 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 12:24:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:24:00,038 INFO L93 Difference]: Finished difference Result 7262 states and 8351 transitions. [2022-03-18 12:24:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 12:24:00,038 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 293 [2022-03-18 12:24:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:24:00,053 INFO L225 Difference]: With dead ends: 7262 [2022-03-18 12:24:00,054 INFO L226 Difference]: Without dead ends: 6597 [2022-03-18 12:24:00,057 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 12:24:00,058 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 807 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:24:00,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 44 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:24:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-03-18 12:24:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 2416. [2022-03-18 12:24:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2400 states have (on average 1.1604166666666667) internal successors, (2785), 2403 states have internal predecessors, (2785), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:24:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2800 transitions. [2022-03-18 12:24:00,179 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2800 transitions. Word has length 293 [2022-03-18 12:24:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:24:00,179 INFO L478 AbstractCegarLoop]: Abstraction has 2416 states and 2800 transitions. [2022-03-18 12:24:00,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 12:24:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2800 transitions. [2022-03-18 12:24:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-18 12:24:00,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:24:00,187 INFO L500 BasicCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:24:00,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 12:24:00,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 12:24:00,399 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:24:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:24:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash -933968960, now seen corresponding path program 2 times [2022-03-18 12:24:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:24:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337120324] [2022-03-18 12:24:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:24:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:24:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:03,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:24:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-03-18 12:24:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-18 12:24:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:24:03,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337120324] [2022-03-18 12:24:03,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337120324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:24:03,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446086978] [2022-03-18 12:24:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:24:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:24:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:24:03,098 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) [2022-03-18 12:24:03,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 12:24:03,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:24:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:24:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-18 12:24:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:24:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12655 trivial. 0 not checked. [2022-03-18 12:24:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:24:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-18 12:24:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446086978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:24:11,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:24:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-18 12:24:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265533901] [2022-03-18 12:24:11,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:24:11,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-03-18 12:24:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:24:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-03-18 12:24:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 12:24:11,842 INFO L87 Difference]: Start difference. First operand 2416 states and 2800 transitions. Second operand has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 12:24:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:24:15,985 INFO L93 Difference]: Finished difference Result 14315 states and 16490 transitions. [2022-03-18 12:24:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-18 12:24:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 575 [2022-03-18 12:24:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:24:16,015 INFO L225 Difference]: With dead ends: 14315 [2022-03-18 12:24:16,015 INFO L226 Difference]: Without dead ends: 12809 [2022-03-18 12:24:16,022 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 12:24:16,023 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 1351 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:24:16,023 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 74 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 12:24:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12809 states. [2022-03-18 12:24:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12809 to 5236. [2022-03-18 12:24:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5220 states have (on average 1.1457854406130268) internal successors, (5981), 5223 states have internal predecessors, (5981), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:24:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 5996 transitions. [2022-03-18 12:24:16,499 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 5996 transitions. Word has length 575 [2022-03-18 12:24:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:24:16,499 INFO L478 AbstractCegarLoop]: Abstraction has 5236 states and 5996 transitions. [2022-03-18 12:24:16,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 12:24:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 5996 transitions. [2022-03-18 12:24:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2022-03-18 12:24:16,523 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:24:16,523 INFO L500 BasicCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:24:16,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 12:24:16,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:24:16,739 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:24:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:24:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1062528000, now seen corresponding path program 3 times [2022-03-18 12:24:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:24:16,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194191129] [2022-03-18 12:24:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:24:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:24:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:26,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:24:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:26,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2022-03-18 12:24:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:24:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 104164 proven. 51801 refuted. 0 times theorem prover too weak. 51804 trivial. 0 not checked. [2022-03-18 12:24:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:24:26,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194191129] [2022-03-18 12:24:26,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194191129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:24:26,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182645687] [2022-03-18 12:24:26,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:24:26,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:24:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:24:26,884 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) [2022-03-18 12:24:26,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 12:24:26,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:24:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:24:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:24:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:24:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 558 proven. 104165 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-03-18 12:24:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:24:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 5 proven. 1115 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-03-18 12:24:33,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182645687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:24:33,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:24:33,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [190, 10, 8] total 202 [2022-03-18 12:24:33,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309171754] [2022-03-18 12:24:33,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:24:33,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-03-18 12:24:33,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:24:33,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-03-18 12:24:33,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18187, Invalid=22415, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 12:24:33,597 INFO L87 Difference]: Start difference. First operand 5236 states and 5996 transitions. Second operand has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:25:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:25:39,506 INFO L93 Difference]: Finished difference Result 13589 states and 15541 transitions. [2022-03-18 12:25:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2022-03-18 12:25:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 1139 [2022-03-18 12:25:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:25:39,507 INFO L225 Difference]: With dead ends: 13589 [2022-03-18 12:25:39,507 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 12:25:39,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 3039 GetRequests, 2268 SyntacticMatches, 3 SemanticMatches, 768 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165203 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=163348, Invalid=428782, Unknown=0, NotChecked=0, Total=592130 [2022-03-18 12:25:39,551 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 4937 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4940 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:25:39,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4940 Valid, 86 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 12:25:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 12:25:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 12:25:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 12:25:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 12:25:39,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1139 [2022-03-18 12:25:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:25:39,552 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 12:25:39,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:25:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 12:25:39,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 12:25:39,555 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 12:25:39,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 12:25:39,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 12:25:39,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.