/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/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:38:04,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:38:04,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:38:04,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:38:04,535 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 12:38:04,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:38:04,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:38:04,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:38:04,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:38:04,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:38:04,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:38:04,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:38:04,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:38:04,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:38:04,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:38:04,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:38:04,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:38:04,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:38:04,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:38:04,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:38:04,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:38:04,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:38:04,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:38:04,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:38:04,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:38:04,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:38:04,769 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:38:04,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-03-18 12:38:04,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eae26929/6998985307fe443aa13522d1461d0ac5/FLAGc2118fda9 [2022-03-18 12:38:05,175 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:38:05,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-03-18 12:38:05,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eae26929/6998985307fe443aa13522d1461d0ac5/FLAGc2118fda9 [2022-03-18 12:38:05,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eae26929/6998985307fe443aa13522d1461d0ac5 [2022-03-18 12:38:05,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:38:05,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:38:05,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:38:05,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:38:05,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:38:05,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742cefed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05, skipping insertion in model container [2022-03-18 12:38:05,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:38:05,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:38:05,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-03-18 12:38:05,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:38:05,333 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:38:05,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-03-18 12:38:05,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:38:05,352 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:38:05,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05 WrapperNode [2022-03-18 12:38:05,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:38:05,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:38:05,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:38:05,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:38:05,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:38:05,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:38:05,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:38:05,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:38:05,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (1/1) ... [2022-03-18 12:38:05,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:38:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:05,394 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 12:38:05,414 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 12:38:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:38:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:38:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:38:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:38:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:38:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:38:05,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:38:05,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:38:05,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:38:05,481 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:38:05,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:38:05,586 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:38:05,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:38:05,599 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 12:38:05,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:38:05 BoogieIcfgContainer [2022-03-18 12:38:05,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:38:05,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:38:05,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:38:05,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:38:05,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:38:05" (1/3) ... [2022-03-18 12:38:05,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a312cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:38:05, skipping insertion in model container [2022-03-18 12:38:05,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:38:05" (2/3) ... [2022-03-18 12:38:05,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a312cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:38:05, skipping insertion in model container [2022-03-18 12:38:05,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:38:05" (3/3) ... [2022-03-18 12:38:05,617 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-03-18 12:38:05,620 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:38:05,620 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:38:05,660 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:38:05,665 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 12:38:05,665 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:38:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 12:38:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 12:38:05,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:05,678 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:05,679 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2066875484, now seen corresponding path program 1 times [2022-03-18 12:38:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971714376] [2022-03-18 12:38:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:05,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:05,833 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 12:38:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:05,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971714376] [2022-03-18 12:38:05,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971714376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:38:05,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:38:05,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 12:38:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248152903] [2022-03-18 12:38:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:38:05,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 12:38:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 12:38:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:38:05,862 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 12:38:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:05,886 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-18 12:38:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 12:38:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-03-18 12:38:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:05,895 INFO L225 Difference]: With dead ends: 39 [2022-03-18 12:38:05,895 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 12:38:05,897 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:38:05,899 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:05,900 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:38:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 12:38:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-18 12:38:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 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 12:38:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-03-18 12:38:05,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2022-03-18 12:38:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:05,924 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-03-18 12:38:05,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 12:38:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-03-18 12:38:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 12:38:05,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:05,926 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:05,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:38:05,926 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:05,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2063181400, now seen corresponding path program 1 times [2022-03-18 12:38:05,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:05,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127384057] [2022-03-18 12:38:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:05,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,312 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 12:38:06,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127384057] [2022-03-18 12:38:06,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127384057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:38:06,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:38:06,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 12:38:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408413820] [2022-03-18 12:38:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:38:06,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:38:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:06,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:38:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:38:06,318 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 12:38:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:06,532 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-03-18 12:38:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 12:38:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 15 [2022-03-18 12:38:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:06,534 INFO L225 Difference]: With dead ends: 33 [2022-03-18 12:38:06,534 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 12:38:06,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:38:06,535 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:06,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 12:38:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-18 12:38:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 3 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 12:38:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-03-18 12:38:06,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2022-03-18 12:38:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:06,541 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-03-18 12:38:06,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 12:38:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-03-18 12:38:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:38:06,541 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:06,541 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:06,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 12:38:06,542 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 971437455, now seen corresponding path program 1 times [2022-03-18 12:38:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:06,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621753131] [2022-03-18 12:38:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621753131] [2022-03-18 12:38:06,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621753131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:38:06,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:38:06,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:38:06,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820882] [2022-03-18 12:38:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:38:06,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:38:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:38:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:38:06,598 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12:38:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:06,632 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-03-18 12:38:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:38:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2022-03-18 12:38:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:06,633 INFO L225 Difference]: With dead ends: 33 [2022-03-18 12:38:06,634 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 12:38:06,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:38:06,639 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:06,639 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:38:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 12:38:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-18 12:38:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 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 12:38:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-18 12:38:06,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 16 [2022-03-18 12:38:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:06,643 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-18 12:38:06,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12:38:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-18 12:38:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:38:06,644 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:06,644 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:06,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 12:38:06,644 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1509444864, now seen corresponding path program 1 times [2022-03-18 12:38:06,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:06,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602259777] [2022-03-18 12:38:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:06,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:06,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:06,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602259777] [2022-03-18 12:38:06,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602259777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:38:06,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:38:06,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 12:38:06,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679999742] [2022-03-18 12:38:06,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:38:06,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:38:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:38:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:38:06,683 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 12:38:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:06,721 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-03-18 12:38:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:38:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-18 12:38:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:06,722 INFO L225 Difference]: With dead ends: 27 [2022-03-18 12:38:06,722 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 12:38:06,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:38:06,726 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:06,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:38:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 12:38:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 12:38:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 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 12:38:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-18 12:38:06,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 16 [2022-03-18 12:38:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:06,729 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-18 12:38:06,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 12:38:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-18 12:38:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:38:06,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:06,729 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:06,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 12:38:06,730 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash 570818913, now seen corresponding path program 1 times [2022-03-18 12:38:06,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:06,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444268056] [2022-03-18 12:38:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:06,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,796 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 12:38:06,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:06,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444268056] [2022-03-18 12:38:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444268056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218871000] [2022-03-18 12:38:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:06,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:06,798 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 12:38:06,800 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 12:38:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 12:38:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:06,927 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 12:38:06,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:07,001 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 12:38:07,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218871000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:07,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:07,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 12:38:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357788600] [2022-03-18 12:38:07,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:07,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:38:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:38:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:38:07,003 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 12:38:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:07,186 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2022-03-18 12:38:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 12:38:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 16 [2022-03-18 12:38:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:07,187 INFO L225 Difference]: With dead ends: 43 [2022-03-18 12:38:07,187 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 12:38:07,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:38:07,189 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:07,190 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 31 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 12:38:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-03-18 12:38:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 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 12:38:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-18 12:38:07,203 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2022-03-18 12:38:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:07,203 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-18 12:38:07,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 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 12:38:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-18 12:38:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 12:38:07,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:07,204 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:07,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 12:38:07,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:07,419 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1344200880, now seen corresponding path program 1 times [2022-03-18 12:38:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:07,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119519176] [2022-03-18 12:38:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:07,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:38:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:07,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119519176] [2022-03-18 12:38:07,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119519176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:07,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314132643] [2022-03-18 12:38:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:07,479 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 12:38:07,480 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 12:38:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:38:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:38:07,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:38:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314132643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:07,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:07,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-18 12:38:07,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234023455] [2022-03-18 12:38:07,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:07,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:38:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:38:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:38:07,623 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 12:38:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:07,682 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-18 12:38:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:38:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 18 [2022-03-18 12:38:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:07,683 INFO L225 Difference]: With dead ends: 45 [2022-03-18 12:38:07,683 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 12:38:07,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:38:07,684 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:07,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:38:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 12:38:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-03-18 12:38:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 3 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 12:38:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-03-18 12:38:07,689 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-03-18 12:38:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:07,689 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-03-18 12:38:07,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 12:38:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-03-18 12:38:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:38:07,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:07,690 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:07,709 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 12:38:07,903 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,SelfDestructingSolverStorable5 [2022-03-18 12:38:07,904 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1244950584, now seen corresponding path program 1 times [2022-03-18 12:38:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:07,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811953350] [2022-03-18 12:38:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811953350] [2022-03-18 12:38:08,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811953350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:08,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293639538] [2022-03-18 12:38:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:08,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:08,103 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 12:38:08,104 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 12:38:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:38:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:08,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:09,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293639538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:09,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:09,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 26 [2022-03-18 12:38:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438438762] [2022-03-18 12:38:09,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:09,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:38:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:38:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:38:09,029 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:38:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:09,541 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-18 12:38:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 12:38:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 12:38:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:09,547 INFO L225 Difference]: With dead ends: 52 [2022-03-18 12:38:09,547 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 12:38:09,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 12:38:09,548 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:09,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 79 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:38:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 12:38:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-18 12:38:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 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 12:38:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-03-18 12:38:09,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2022-03-18 12:38:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:09,553 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-03-18 12:38:09,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:38:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-03-18 12:38:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:38:09,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:09,553 INFO L500 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:09,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 12:38:09,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:09,767 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 146579608, now seen corresponding path program 2 times [2022-03-18 12:38:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729656370] [2022-03-18 12:38:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:09,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729656370] [2022-03-18 12:38:09,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729656370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562665714] [2022-03-18 12:38:09,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:38:09,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:09,841 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 12:38:09,842 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 12:38:09,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:38:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 12:38:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:10,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562665714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:10,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:10,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 12:38:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924544273] [2022-03-18 12:38:10,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:10,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 12:38:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 12:38:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:38:10,018 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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 12:38:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:10,665 INFO L93 Difference]: Finished difference Result 112 states and 185 transitions. [2022-03-18 12:38:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 12:38:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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 19 [2022-03-18 12:38:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:10,672 INFO L225 Difference]: With dead ends: 112 [2022-03-18 12:38:10,672 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 12:38:10,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 12:38:10,673 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:10,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 60 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:38:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 12:38:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2022-03-18 12:38:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 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 12:38:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-03-18 12:38:10,681 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 19 [2022-03-18 12:38:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:10,681 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-03-18 12:38:10,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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 12:38:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-03-18 12:38:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 12:38:10,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:10,682 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:10,701 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 12:38:10,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:10,883 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1586904504, now seen corresponding path program 2 times [2022-03-18 12:38:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:10,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486098582] [2022-03-18 12:38:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:10,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:38:10,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486098582] [2022-03-18 12:38:10,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486098582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926019794] [2022-03-18 12:38:10,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:38:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:10,946 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 12:38:10,947 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 12:38:10,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:38:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:38:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:38:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:38:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926019794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:11,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:11,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-03-18 12:38:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676993165] [2022-03-18 12:38:11,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:11,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 12:38:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 12:38:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:38:11,107 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 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 12:38:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:11,338 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2022-03-18 12:38:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 12:38:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 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 21 [2022-03-18 12:38:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:11,339 INFO L225 Difference]: With dead ends: 85 [2022-03-18 12:38:11,339 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 12:38:11,340 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:38:11,340 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:11,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 12:38:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2022-03-18 12:38:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 3 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 12:38:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-03-18 12:38:11,347 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 21 [2022-03-18 12:38:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:11,347 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-03-18 12:38:11,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 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 12:38:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-03-18 12:38:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 12:38:11,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:11,348 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:11,366 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 12:38:11,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:11,564 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:11,564 INFO L85 PathProgramCache]: Analyzing trace with hash 323810136, now seen corresponding path program 2 times [2022-03-18 12:38:11,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:11,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140165317] [2022-03-18 12:38:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:11,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:38:11,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:11,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140165317] [2022-03-18 12:38:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140165317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:11,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929508004] [2022-03-18 12:38:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:38:11,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:11,620 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 12:38:11,621 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 12:38:11,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:38:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 12:38:11,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:38:11,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:38:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929508004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:11,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-03-18 12:38:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962231466] [2022-03-18 12:38:11,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:11,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:38:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:38:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:38:11,743 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 12:38:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:11,837 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2022-03-18 12:38:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:38:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 21 [2022-03-18 12:38:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:11,838 INFO L225 Difference]: With dead ends: 78 [2022-03-18 12:38:11,838 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 12:38:11,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-18 12:38:11,839 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:11,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 12:38:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2022-03-18 12:38:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 3 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 12:38:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2022-03-18 12:38:11,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 21 [2022-03-18 12:38:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:11,848 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2022-03-18 12:38:11,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 12:38:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2022-03-18 12:38:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:38:11,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:11,849 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:11,867 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 12:38:12,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:12,070 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1247228840, now seen corresponding path program 3 times [2022-03-18 12:38:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:12,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276736725] [2022-03-18 12:38:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:12,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:12,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:12,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276736725] [2022-03-18 12:38:12,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276736725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:12,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519542521] [2022-03-18 12:38:12,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:38:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:12,327 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 12:38:12,331 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 12:38:12,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 12:38:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 12:38:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:14,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:14,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519542521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:14,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:14,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-18 12:38:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602062470] [2022-03-18 12:38:14,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:14,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 12:38:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 12:38:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 12:38:14,957 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:38:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:18,838 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2022-03-18 12:38:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 12:38:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 12:38:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:18,839 INFO L225 Difference]: With dead ends: 93 [2022-03-18 12:38:18,839 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 12:38:18,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=351, Invalid=2729, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 12:38:18,840 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:18,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 108 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 12:38:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 12:38:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-03-18 12:38:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 3 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 12:38:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2022-03-18 12:38:18,848 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 23 [2022-03-18 12:38:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:18,848 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2022-03-18 12:38:18,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:38:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2022-03-18 12:38:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:38:18,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:18,849 INFO L500 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:18,852 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 12:38:19,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:19,051 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1493658120, now seen corresponding path program 4 times [2022-03-18 12:38:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500454578] [2022-03-18 12:38:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:38:19,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:19,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500454578] [2022-03-18 12:38:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500454578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025097210] [2022-03-18 12:38:19,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:38:19,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:19,140 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 12:38:19,141 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 12:38:19,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:38:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 12:38:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:38:19,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:38:19,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025097210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:19,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:19,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 12:38:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519645217] [2022-03-18 12:38:19,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:19,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 12:38:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 12:38:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-18 12:38:19,348 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 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 12:38:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:21,918 INFO L93 Difference]: Finished difference Result 178 states and 265 transitions. [2022-03-18 12:38:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 12:38:21,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 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 23 [2022-03-18 12:38:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:21,919 INFO L225 Difference]: With dead ends: 178 [2022-03-18 12:38:21,919 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 12:38:21,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1367, Invalid=4183, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 12:38:21,921 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:21,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 84 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:38:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 12:38:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 95. [2022-03-18 12:38:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 90 states have internal predecessors, (123), 3 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 12:38:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 127 transitions. [2022-03-18 12:38:21,936 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 127 transitions. Word has length 23 [2022-03-18 12:38:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:21,937 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 127 transitions. [2022-03-18 12:38:21,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 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 12:38:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 127 transitions. [2022-03-18 12:38:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 12:38:21,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:21,937 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:21,954 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 12:38:22,145 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,SelfDestructingSolverStorable11 [2022-03-18 12:38:22,145 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1347388208, now seen corresponding path program 3 times [2022-03-18 12:38:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:22,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42194312] [2022-03-18 12:38:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:22,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:38:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42194312] [2022-03-18 12:38:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42194312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371106474] [2022-03-18 12:38:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:38:22,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:22,228 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 12:38:22,229 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 12:38:22,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:38:22,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:38:22,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:38:22,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:38:22,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371106474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:22,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:22,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-03-18 12:38:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964004048] [2022-03-18 12:38:22,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:22,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 12:38:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 12:38:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 12:38:22,382 INFO L87 Difference]: Start difference. First operand 95 states and 127 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 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 12:38:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:22,531 INFO L93 Difference]: Finished difference Result 122 states and 166 transitions. [2022-03-18 12:38:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:38:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 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 24 [2022-03-18 12:38:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:22,532 INFO L225 Difference]: With dead ends: 122 [2022-03-18 12:38:22,532 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 12:38:22,532 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:38:22,532 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:22,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 12:38:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2022-03-18 12:38:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 3 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 12:38:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-03-18 12:38:22,544 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 24 [2022-03-18 12:38:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:22,544 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-03-18 12:38:22,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 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 12:38:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-03-18 12:38:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 12:38:22,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:22,545 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:22,561 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 12:38:22,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:38:22,751 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash 467119846, now seen corresponding path program 5 times [2022-03-18 12:38:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:22,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052910073] [2022-03-18 12:38:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:38:22,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052910073] [2022-03-18 12:38:22,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052910073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57217612] [2022-03-18 12:38:22,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:38:22,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:22,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:22,824 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 12:38:22,825 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 12:38:22,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 12:38:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:38:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:38:22,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:38:23,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57217612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:23,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:23,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-03-18 12:38:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227691247] [2022-03-18 12:38:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:23,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 12:38:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 12:38:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-18 12:38:23,074 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 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 12:38:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:23,560 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2022-03-18 12:38:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 12:38:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 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 25 [2022-03-18 12:38:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:23,561 INFO L225 Difference]: With dead ends: 150 [2022-03-18 12:38:23,561 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 12:38:23,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 12:38:23,562 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:23,562 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:38:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 12:38:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2022-03-18 12:38:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.3663366336633664) internal successors, (138), 101 states have internal predecessors, (138), 3 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 12:38:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2022-03-18 12:38:23,572 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 25 [2022-03-18 12:38:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:23,572 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2022-03-18 12:38:23,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 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 12:38:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2022-03-18 12:38:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:38:23,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:23,573 INFO L500 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:23,589 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 12:38:23,783 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,SelfDestructingSolverStorable13 [2022-03-18 12:38:23,783 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash 415342529, now seen corresponding path program 3 times [2022-03-18 12:38:23,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:23,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460445455] [2022-03-18 12:38:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:23,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:23,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460445455] [2022-03-18 12:38:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460445455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640267081] [2022-03-18 12:38:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:38:23,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:23,937 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 12:38:23,938 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 12:38:24,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 12:38:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 12:38:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:24,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640267081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:24,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:24,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-18 12:38:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998039103] [2022-03-18 12:38:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:24,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 12:38:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 12:38:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-03-18 12:38:24,412 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 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 12:38:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:52,495 INFO L93 Difference]: Finished difference Result 398 states and 600 transitions. [2022-03-18 12:38:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 12:38:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 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 12:38:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:52,502 INFO L225 Difference]: With dead ends: 398 [2022-03-18 12:38:52,502 INFO L226 Difference]: Without dead ends: 365 [2022-03-18 12:38:52,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=1980, Invalid=5676, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 12:38:52,504 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 762 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:52,504 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 104 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 12:38:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-03-18 12:38:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 155. [2022-03-18 12:38:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.3666666666666667) internal successors, (205), 150 states have internal predecessors, (205), 3 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 12:38:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 209 transitions. [2022-03-18 12:38:52,544 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 209 transitions. Word has length 26 [2022-03-18 12:38:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:52,544 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 209 transitions. [2022-03-18 12:38:52,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 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 12:38:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 209 transitions. [2022-03-18 12:38:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:38:52,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:52,545 INFO L500 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:52,551 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 12:38:52,747 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,SelfDestructingSolverStorable14 [2022-03-18 12:38:52,747 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 523877976, now seen corresponding path program 6 times [2022-03-18 12:38:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:52,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962540322] [2022-03-18 12:38:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:52,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:38:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962540322] [2022-03-18 12:38:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962540322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:52,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506929688] [2022-03-18 12:38:52,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:38:52,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:52,794 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 12:38:52,795 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 12:38:52,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 12:38:52,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:38:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:38:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:38:52,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:38:53,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506929688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:53,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:53,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 17 [2022-03-18 12:38:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933287184] [2022-03-18 12:38:53,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:53,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 12:38:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:53,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 12:38:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:38:53,071 INFO L87 Difference]: Start difference. First operand 155 states and 209 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 12:38:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:38:54,436 INFO L93 Difference]: Finished difference Result 342 states and 494 transitions. [2022-03-18 12:38:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 12:38:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 27 [2022-03-18 12:38:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:38:54,438 INFO L225 Difference]: With dead ends: 342 [2022-03-18 12:38:54,438 INFO L226 Difference]: Without dead ends: 323 [2022-03-18 12:38:54,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 12:38:54,439 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:38:54,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 93 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:38:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-18 12:38:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2022-03-18 12:38:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.4444444444444444) internal successors, (455), 315 states have internal predecessors, (455), 3 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 12:38:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 459 transitions. [2022-03-18 12:38:54,486 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 459 transitions. Word has length 27 [2022-03-18 12:38:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:38:54,487 INFO L478 AbstractCegarLoop]: Abstraction has 320 states and 459 transitions. [2022-03-18 12:38:54,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 12:38:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 459 transitions. [2022-03-18 12:38:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:38:54,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:38:54,487 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:38:54,491 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 12:38:54,689 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,SelfDestructingSolverStorable15 [2022-03-18 12:38:54,689 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:38:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:38:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash -828351928, now seen corresponding path program 7 times [2022-03-18 12:38:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:38:54,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020609837] [2022-03-18 12:38:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:38:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:38:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:38:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:54,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:38:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020609837] [2022-03-18 12:38:54,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020609837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:38:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725935269] [2022-03-18 12:38:54,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:38:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:38:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:38:54,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:38:54,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 12:38:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:38:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 12:38:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:38:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:55,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:38:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:38:56,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725935269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:38:56,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:38:56,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-03-18 12:38:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299182164] [2022-03-18 12:38:56,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:38:56,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 12:38:56,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:38:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 12:38:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:38:56,955 INFO L87 Difference]: Start difference. First operand 320 states and 459 transitions. Second operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:02,109 INFO L93 Difference]: Finished difference Result 382 states and 538 transitions. [2022-03-18 12:39:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 12:39:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 12:39:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:02,110 INFO L225 Difference]: With dead ends: 382 [2022-03-18 12:39:02,111 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 12:39:02,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=634, Invalid=5218, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 12:39:02,112 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:02,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 148 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 12:39:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 12:39:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 322. [2022-03-18 12:39:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.4227129337539433) internal successors, (451), 317 states have internal predecessors, (451), 3 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 12:39:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 455 transitions. [2022-03-18 12:39:02,143 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 455 transitions. Word has length 27 [2022-03-18 12:39:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:02,144 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 455 transitions. [2022-03-18 12:39:02,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 455 transitions. [2022-03-18 12:39:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:39:02,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:02,144 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:02,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 12:39:02,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 12:39:02,347 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash -734568360, now seen corresponding path program 4 times [2022-03-18 12:39:02,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:02,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116444042] [2022-03-18 12:39:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:02,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:02,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:02,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116444042] [2022-03-18 12:39:02,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116444042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202210791] [2022-03-18 12:39:02,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:39:02,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:02,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:02,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 12:39:02,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:39:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:39:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:02,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:02,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202210791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:02,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:02,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-03-18 12:39:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700942938] [2022-03-18 12:39:02,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:02,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 12:39:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 12:39:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:39:02,610 INFO L87 Difference]: Start difference. First operand 322 states and 455 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 12:39:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:02,878 INFO L93 Difference]: Finished difference Result 336 states and 476 transitions. [2022-03-18 12:39:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 12:39:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 27 [2022-03-18 12:39:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:02,880 INFO L225 Difference]: With dead ends: 336 [2022-03-18 12:39:02,880 INFO L226 Difference]: Without dead ends: 331 [2022-03-18 12:39:02,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-18 12:39:02,881 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:02,881 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 65 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:39:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-18 12:39:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 322. [2022-03-18 12:39:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.4195583596214512) internal successors, (450), 317 states have internal predecessors, (450), 3 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 12:39:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 454 transitions. [2022-03-18 12:39:02,913 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 454 transitions. Word has length 27 [2022-03-18 12:39:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:02,913 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 454 transitions. [2022-03-18 12:39:02,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 12:39:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 454 transitions. [2022-03-18 12:39:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 12:39:02,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:02,914 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:02,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:03,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:03,123 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2010729856, now seen corresponding path program 5 times [2022-03-18 12:39:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:03,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602303116] [2022-03-18 12:39:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:03,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602303116] [2022-03-18 12:39:03,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602303116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569740831] [2022-03-18 12:39:03,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:39:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:03,232 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 12:39:03,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:39:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 12:39:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:03,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:39:03,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569740831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:03,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:03,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-18 12:39:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13100404] [2022-03-18 12:39:03,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:03,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 12:39:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 12:39:03,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:39:03,619 INFO L87 Difference]: Start difference. First operand 322 states and 454 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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 12:39:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:04,647 INFO L93 Difference]: Finished difference Result 677 states and 869 transitions. [2022-03-18 12:39:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 12:39:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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 28 [2022-03-18 12:39:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:04,649 INFO L225 Difference]: With dead ends: 677 [2022-03-18 12:39:04,649 INFO L226 Difference]: Without dead ends: 603 [2022-03-18 12:39:04,650 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=852, Invalid=3704, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 12:39:04,650 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:04,651 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 95 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:39:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-18 12:39:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 356. [2022-03-18 12:39:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.4472934472934473) internal successors, (508), 351 states have internal predecessors, (508), 3 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 12:39:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 512 transitions. [2022-03-18 12:39:04,688 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 512 transitions. Word has length 28 [2022-03-18 12:39:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:04,688 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 512 transitions. [2022-03-18 12:39:04,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 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 12:39:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 512 transitions. [2022-03-18 12:39:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 12:39:04,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:04,689 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:04,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-18 12:39:04,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:04,893 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1541621168, now seen corresponding path program 6 times [2022-03-18 12:39:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:04,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924211682] [2022-03-18 12:39:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:05,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:39:05,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924211682] [2022-03-18 12:39:05,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924211682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989549518] [2022-03-18 12:39:05,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:39:05,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:05,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:05,011 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:05,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 12:39:05,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 12:39:05,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:39:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:39:05,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:39:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989549518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:05,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-03-18 12:39:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868065107] [2022-03-18 12:39:05,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:05,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 12:39:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 12:39:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:39:05,219 INFO L87 Difference]: Start difference. First operand 356 states and 512 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 12:39:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:05,534 INFO L93 Difference]: Finished difference Result 374 states and 539 transitions. [2022-03-18 12:39:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 12:39:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 30 [2022-03-18 12:39:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:05,536 INFO L225 Difference]: With dead ends: 374 [2022-03-18 12:39:05,536 INFO L226 Difference]: Without dead ends: 369 [2022-03-18 12:39:05,536 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:39:05,536 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:05,537 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 72 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:39:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-18 12:39:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 356. [2022-03-18 12:39:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.4415954415954415) internal successors, (506), 351 states have internal predecessors, (506), 3 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 12:39:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 510 transitions. [2022-03-18 12:39:05,577 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 510 transitions. Word has length 30 [2022-03-18 12:39:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:05,577 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 510 transitions. [2022-03-18 12:39:05,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 12:39:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 510 transitions. [2022-03-18 12:39:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 12:39:05,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:05,578 INFO L500 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:05,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:05,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:05,783 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -759780175, now seen corresponding path program 8 times [2022-03-18 12:39:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753301363] [2022-03-18 12:39:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:05,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753301363] [2022-03-18 12:39:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753301363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325004753] [2022-03-18 12:39:05,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:39:05,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:05,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 12:39:06,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:39:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 12:39:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:06,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:06,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325004753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:06,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:06,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 12:39:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563682148] [2022-03-18 12:39:06,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:06,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 12:39:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 12:39:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 12:39:06,437 INFO L87 Difference]: Start difference. First operand 356 states and 510 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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 12:39:25,242 WARN L232 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:39:39,402 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-03-18 12:40:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:45,916 INFO L93 Difference]: Finished difference Result 1203 states and 1905 transitions. [2022-03-18 12:40:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-18 12:40:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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 30 [2022-03-18 12:40:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:45,922 INFO L225 Difference]: With dead ends: 1203 [2022-03-18 12:40:45,922 INFO L226 Difference]: Without dead ends: 1140 [2022-03-18 12:40:45,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8662 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=5612, Invalid=17646, Unknown=2, NotChecked=302, Total=23562 [2022-03-18 12:40:45,927 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 768 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:45,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 111 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 1290 Invalid, 0 Unknown, 1 Unchecked, 5.6s Time] [2022-03-18 12:40:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-03-18 12:40:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 426. [2022-03-18 12:40:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 421 states have (on average 1.4536817102137767) internal successors, (612), 421 states have internal predecessors, (612), 3 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 12:40:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 616 transitions. [2022-03-18 12:40:46,010 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 616 transitions. Word has length 30 [2022-03-18 12:40:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:46,011 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 616 transitions. [2022-03-18 12:40:46,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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 12:40:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 616 transitions. [2022-03-18 12:40:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 12:40:46,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:46,011 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:46,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:46,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:46,224 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1818120792, now seen corresponding path program 9 times [2022-03-18 12:40:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:46,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160239218] [2022-03-18 12:40:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:40:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160239218] [2022-03-18 12:40:46,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160239218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296671806] [2022-03-18 12:40:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:40:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:46,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 12:40:46,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:40:46,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:46,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 12:40:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:40:47,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:40:49,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296671806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:49,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:49,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 60 [2022-03-18 12:40:49,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27042090] [2022-03-18 12:40:49,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:49,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 12:40:49,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 12:40:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3161, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 12:40:49,103 INFO L87 Difference]: Start difference. First operand 426 states and 616 transitions. Second operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:54,597 INFO L93 Difference]: Finished difference Result 452 states and 644 transitions. [2022-03-18 12:40:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 12:40:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 12:40:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:54,598 INFO L225 Difference]: With dead ends: 452 [2022-03-18 12:40:54,598 INFO L226 Difference]: Without dead ends: 425 [2022-03-18 12:40:54,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1031, Invalid=7899, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 12:40:54,599 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:54,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 206 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 12:40:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-18 12:40:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2022-03-18 12:40:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.4578313253012047) internal successors, (605), 415 states have internal predecessors, (605), 3 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 12:40:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 609 transitions. [2022-03-18 12:40:54,655 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 609 transitions. Word has length 31 [2022-03-18 12:40:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:54,655 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 609 transitions. [2022-03-18 12:40:54,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 609 transitions. [2022-03-18 12:40:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 12:40:54,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:54,656 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:54,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:54,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:54,856 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash -281941914, now seen corresponding path program 7 times [2022-03-18 12:40:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898889229] [2022-03-18 12:40:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:54,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898889229] [2022-03-18 12:40:54,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898889229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420563504] [2022-03-18 12:40:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:40:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:54,999 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:55,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 12:40:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 12:40:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:55,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:55,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420563504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:55,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:55,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-03-18 12:40:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524434692] [2022-03-18 12:40:55,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:55,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 12:40:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 12:40:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:40:55,462 INFO L87 Difference]: Start difference. First operand 420 states and 609 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 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 12:40:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:57,247 INFO L93 Difference]: Finished difference Result 801 states and 1020 transitions. [2022-03-18 12:40:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 12:40:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 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 31 [2022-03-18 12:40:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:57,249 INFO L225 Difference]: With dead ends: 801 [2022-03-18 12:40:57,249 INFO L226 Difference]: Without dead ends: 728 [2022-03-18 12:40:57,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1269, Invalid=5703, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 12:40:57,250 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 259 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:57,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 98 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:40:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-18 12:40:57,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 429. [2022-03-18 12:40:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 424 states have (on average 1.4433962264150944) internal successors, (612), 424 states have internal predecessors, (612), 3 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 12:40:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 616 transitions. [2022-03-18 12:40:57,310 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 616 transitions. Word has length 31 [2022-03-18 12:40:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:57,310 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 616 transitions. [2022-03-18 12:40:57,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 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 12:40:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 616 transitions. [2022-03-18 12:40:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 12:40:57,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:57,311 INFO L500 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:57,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 12:40:57,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:57,527 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash -397406416, now seen corresponding path program 10 times [2022-03-18 12:40:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:57,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975515730] [2022-03-18 12:40:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:40:57,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:57,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975515730] [2022-03-18 12:40:57,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975515730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:57,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927301847] [2022-03-18 12:40:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:40:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:57,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:57,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 12:40:57,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:40:57,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 12:40:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:40:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:40:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927301847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:57,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:57,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-18 12:40:57,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120552382] [2022-03-18 12:40:57,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:57,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 12:40:57,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 12:40:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:40:57,748 INFO L87 Difference]: Start difference. First operand 429 states and 616 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 12:40:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:57,893 INFO L93 Difference]: Finished difference Result 439 states and 627 transitions. [2022-03-18 12:40:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:40:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 32 [2022-03-18 12:40:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:57,895 INFO L225 Difference]: With dead ends: 439 [2022-03-18 12:40:57,895 INFO L226 Difference]: Without dead ends: 416 [2022-03-18 12:40:57,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:40:57,895 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:57,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:40:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-18 12:40:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 413. [2022-03-18 12:40:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.4583333333333333) internal successors, (595), 408 states have internal predecessors, (595), 3 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 12:40:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 599 transitions. [2022-03-18 12:40:57,952 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 599 transitions. Word has length 32 [2022-03-18 12:40:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:57,952 INFO L478 AbstractCegarLoop]: Abstraction has 413 states and 599 transitions. [2022-03-18 12:40:57,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 12:40:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 599 transitions. [2022-03-18 12:40:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 12:40:57,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:57,953 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:57,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:58,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-18 12:40:58,167 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2019384376, now seen corresponding path program 11 times [2022-03-18 12:40:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760619006] [2022-03-18 12:40:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 12:40:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760619006] [2022-03-18 12:40:58,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760619006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351968483] [2022-03-18 12:40:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:40:58,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:58,306 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:58,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 12:40:58,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:40:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 12:40:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 12:40:58,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 12:40:58,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351968483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:58,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:58,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 26 [2022-03-18 12:40:58,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154624505] [2022-03-18 12:40:58,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:58,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:40:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:40:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:40:58,673 INFO L87 Difference]: Start difference. First operand 413 states and 599 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 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 12:40:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:59,891 INFO L93 Difference]: Finished difference Result 596 states and 818 transitions. [2022-03-18 12:40:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 12:40:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 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 33 [2022-03-18 12:40:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:59,893 INFO L225 Difference]: With dead ends: 596 [2022-03-18 12:40:59,893 INFO L226 Difference]: Without dead ends: 516 [2022-03-18 12:40:59,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 12:40:59,894 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:59,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:40:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-18 12:40:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 394. [2022-03-18 12:40:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.442159383033419) internal successors, (561), 389 states have internal predecessors, (561), 3 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 12:40:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 565 transitions. [2022-03-18 12:40:59,959 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 565 transitions. Word has length 33 [2022-03-18 12:40:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:59,960 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 565 transitions. [2022-03-18 12:40:59,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 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 12:40:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 565 transitions. [2022-03-18 12:40:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 12:40:59,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:59,961 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:59,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 12:41:00,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 12:41:00,182 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:41:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:41:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -475206312, now seen corresponding path program 8 times [2022-03-18 12:41:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:41:00,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884311816] [2022-03-18 12:41:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:41:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:41:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:41:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:00,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:41:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884311816] [2022-03-18 12:41:00,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884311816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:41:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730720106] [2022-03-18 12:41:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:41:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:41:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:41:00,356 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:41:00,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 12:41:00,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:41:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:41:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:41:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:41:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:41:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 12:41:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730720106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:41:00,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:41:00,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-03-18 12:41:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262280123] [2022-03-18 12:41:00,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:41:00,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 12:41:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:41:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 12:41:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:41:00,622 INFO L87 Difference]: Start difference. First operand 394 states and 565 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 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 12:41:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:41:01,043 INFO L93 Difference]: Finished difference Result 414 states and 595 transitions. [2022-03-18 12:41:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 12:41:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 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 33 [2022-03-18 12:41:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:41:01,045 INFO L225 Difference]: With dead ends: 414 [2022-03-18 12:41:01,045 INFO L226 Difference]: Without dead ends: 409 [2022-03-18 12:41:01,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:41:01,046 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 90 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:41:01,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 85 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:41:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-18 12:41:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2022-03-18 12:41:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.4387755102040816) internal successors, (564), 392 states have internal predecessors, (564), 3 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 12:41:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 568 transitions. [2022-03-18 12:41:01,108 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 568 transitions. Word has length 33 [2022-03-18 12:41:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:41:01,108 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 568 transitions. [2022-03-18 12:41:01,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 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 12:41:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 568 transitions. [2022-03-18 12:41:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 12:41:01,109 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:41:01,109 INFO L500 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:41:01,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 12:41:01,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 12:41:01,309 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:41:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:41:01,310 INFO L85 PathProgramCache]: Analyzing trace with hash -59159359, now seen corresponding path program 12 times [2022-03-18 12:41:01,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:41:01,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810637678] [2022-03-18 12:41:01,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:41:01,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:41:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:01,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:41:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:41:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:41:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:41:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810637678] [2022-03-18 12:41:01,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810637678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:41:01,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412123270] [2022-03-18 12:41:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:41:01,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:41:01,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:41:01,518 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:41:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 12:41:01,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 12:41:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:41:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 12:41:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:41:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:41:01,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:41:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:41:02,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412123270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:41:02,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:41:02,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 34 [2022-03-18 12:41:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306747237] [2022-03-18 12:41:02,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:41:02,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 12:41:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:41:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 12:41:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 12:41:02,185 INFO L87 Difference]: Start difference. First operand 397 states and 568 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 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 12:41:13,089 WARN L232 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:42:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:10,579 INFO L93 Difference]: Finished difference Result 1236 states and 1845 transitions. [2022-03-18 12:42:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 12:42:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 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 34 [2022-03-18 12:42:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:10,582 INFO L225 Difference]: With dead ends: 1236 [2022-03-18 12:42:10,582 INFO L226 Difference]: Without dead ends: 1144 [2022-03-18 12:42:10,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=2671, Invalid=7631, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 12:42:10,584 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 824 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:10,584 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 128 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 12:42:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-03-18 12:42:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 438. [2022-03-18 12:42:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.4549653579676673) internal successors, (630), 433 states have internal predecessors, (630), 3 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 12:42:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 634 transitions. [2022-03-18 12:42:10,651 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 634 transitions. Word has length 34 [2022-03-18 12:42:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:10,651 INFO L478 AbstractCegarLoop]: Abstraction has 438 states and 634 transitions. [2022-03-18 12:42:10,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 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 12:42:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 634 transitions. [2022-03-18 12:42:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 12:42:10,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:10,652 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:10,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 12:42:10,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:10,859 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 144704712, now seen corresponding path program 13 times [2022-03-18 12:42:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898077117] [2022-03-18 12:42:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:11,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:42:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898077117] [2022-03-18 12:42:11,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898077117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190218] [2022-03-18 12:42:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:42:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:11,290 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:11,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 12:42:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:11,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 12:42:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:42:12,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:42:13,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:13,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 22] total 55 [2022-03-18 12:42:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410928427] [2022-03-18 12:42:13,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:13,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 12:42:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 12:42:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 12:42:13,191 INFO L87 Difference]: Start difference. First operand 438 states and 634 transitions. Second operand has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:15,876 INFO L93 Difference]: Finished difference Result 456 states and 652 transitions. [2022-03-18 12:42:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 12:42:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 12:42:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:15,878 INFO L225 Difference]: With dead ends: 456 [2022-03-18 12:42:15,878 INFO L226 Difference]: Without dead ends: 451 [2022-03-18 12:42:15,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=503, Invalid=6303, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 12:42:15,879 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:15,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 169 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 12:42:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-03-18 12:42:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 445. [2022-03-18 12:42:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.4477272727272728) internal successors, (637), 440 states have internal predecessors, (637), 3 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 12:42:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 641 transitions. [2022-03-18 12:42:15,956 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 641 transitions. Word has length 35 [2022-03-18 12:42:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:15,956 INFO L478 AbstractCegarLoop]: Abstraction has 445 states and 641 transitions. [2022-03-18 12:42:15,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 641 transitions. [2022-03-18 12:42:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 12:42:15,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:15,957 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:15,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:16,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 12:42:16,161 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1143532120, now seen corresponding path program 9 times [2022-03-18 12:42:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824056168] [2022-03-18 12:42:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:16,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:42:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824056168] [2022-03-18 12:42:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824056168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276073525] [2022-03-18 12:42:16,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:42:16,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:16,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:16,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 12:42:16,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 12:42:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:16,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 12:42:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:42:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 12:42:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276073525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:17,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:17,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-03-18 12:42:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767659192] [2022-03-18 12:42:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:17,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 12:42:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:17,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 12:42:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 12:42:17,032 INFO L87 Difference]: Start difference. First operand 445 states and 641 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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 12:42:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:20,301 INFO L93 Difference]: Finished difference Result 817 states and 1037 transitions. [2022-03-18 12:42:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 12:42:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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 35 [2022-03-18 12:42:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:20,303 INFO L225 Difference]: With dead ends: 817 [2022-03-18 12:42:20,303 INFO L226 Difference]: Without dead ends: 758 [2022-03-18 12:42:20,304 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=8616, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 12:42:20,304 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 323 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:20,304 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 110 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 12:42:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-18 12:42:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 449. [2022-03-18 12:42:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 444 states have (on average 1.436936936936937) internal successors, (638), 444 states have internal predecessors, (638), 3 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 12:42:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 642 transitions. [2022-03-18 12:42:20,378 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 642 transitions. Word has length 35 [2022-03-18 12:42:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:20,378 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 642 transitions. [2022-03-18 12:42:20,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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 12:42:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 642 transitions. [2022-03-18 12:42:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 12:42:20,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:20,379 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:20,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:20,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 12:42:20,583 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 382085168, now seen corresponding path program 10 times [2022-03-18 12:42:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674480436] [2022-03-18 12:42:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 12:42:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674480436] [2022-03-18 12:42:20,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674480436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619375234] [2022-03-18 12:42:20,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:42:20,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:20,773 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 12:42:20,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:42:20,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:20,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 12:42:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 12:42:20,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 12:42:21,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619375234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:21,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:21,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2022-03-18 12:42:21,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739446497] [2022-03-18 12:42:21,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:21,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 12:42:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 12:42:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-03-18 12:42:21,041 INFO L87 Difference]: Start difference. First operand 449 states and 642 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 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 12:42:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:21,721 INFO L93 Difference]: Finished difference Result 471 states and 672 transitions. [2022-03-18 12:42:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 12:42:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 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 36 [2022-03-18 12:42:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:21,723 INFO L225 Difference]: With dead ends: 471 [2022-03-18 12:42:21,723 INFO L226 Difference]: Without dead ends: 466 [2022-03-18 12:42:21,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 12:42:21,724 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 118 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:21,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 93 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:42:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-18 12:42:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 439. [2022-03-18 12:42:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 434 states have internal predecessors, (624), 3 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 12:42:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 628 transitions. [2022-03-18 12:42:21,809 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 628 transitions. Word has length 36 [2022-03-18 12:42:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:21,810 INFO L478 AbstractCegarLoop]: Abstraction has 439 states and 628 transitions. [2022-03-18 12:42:21,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 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 12:42:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 628 transitions. [2022-03-18 12:42:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 12:42:21,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:21,811 INFO L500 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:21,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:22,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:22,024 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1568849464, now seen corresponding path program 14 times [2022-03-18 12:42:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:22,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140150088] [2022-03-18 12:42:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:42:22,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140150088] [2022-03-18 12:42:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140150088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780189150] [2022-03-18 12:42:22,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:42:22,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:22,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:22,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:22,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 12:42:22,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:42:22,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:22,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 12:42:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:42:22,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:42:22,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780189150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:22,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:22,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-18 12:42:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572287213] [2022-03-18 12:42:22,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:22,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:42:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:42:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:42:22,281 INFO L87 Difference]: Start difference. First operand 439 states and 628 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 12:42:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:22,533 INFO L93 Difference]: Finished difference Result 461 states and 652 transitions. [2022-03-18 12:42:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:42:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 37 [2022-03-18 12:42:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:22,534 INFO L225 Difference]: With dead ends: 461 [2022-03-18 12:42:22,534 INFO L226 Difference]: Without dead ends: 434 [2022-03-18 12:42:22,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:42:22,535 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:22,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 63 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:42:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-18 12:42:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 425. [2022-03-18 12:42:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.45) internal successors, (609), 420 states have internal predecessors, (609), 3 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 12:42:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 613 transitions. [2022-03-18 12:42:22,603 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 613 transitions. Word has length 37 [2022-03-18 12:42:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:22,603 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 613 transitions. [2022-03-18 12:42:22,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 12:42:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 613 transitions. [2022-03-18 12:42:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 12:42:22,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:22,604 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:22,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:22,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:22,819 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1873101146, now seen corresponding path program 15 times [2022-03-18 12:42:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556918564] [2022-03-18 12:42:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 12:42:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556918564] [2022-03-18 12:42:22,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556918564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292389120] [2022-03-18 12:42:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:42:22,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:22,968 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:22,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 12:42:23,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-18 12:42:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 12:42:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 12:42:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-18 12:42:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292389120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:23,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:23,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 31 [2022-03-18 12:42:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647009510] [2022-03-18 12:42:23,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:23,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 12:42:23,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 12:42:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-03-18 12:42:23,530 INFO L87 Difference]: Start difference. First operand 425 states and 613 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 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 12:42:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:25,486 INFO L93 Difference]: Finished difference Result 602 states and 814 transitions. [2022-03-18 12:42:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 12:42:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 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 37 [2022-03-18 12:42:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:25,488 INFO L225 Difference]: With dead ends: 602 [2022-03-18 12:42:25,488 INFO L226 Difference]: Without dead ends: 499 [2022-03-18 12:42:25,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=638, Invalid=5062, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 12:42:25,488 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:25,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 100 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:42:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-18 12:42:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 402. [2022-03-18 12:42:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 397 states have (on average 1.4256926952141058) internal successors, (566), 397 states have internal predecessors, (566), 3 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 12:42:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 570 transitions. [2022-03-18 12:42:25,563 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 570 transitions. Word has length 37 [2022-03-18 12:42:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:25,564 INFO L478 AbstractCegarLoop]: Abstraction has 402 states and 570 transitions. [2022-03-18 12:42:25,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 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 12:42:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 570 transitions. [2022-03-18 12:42:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 12:42:25,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:25,564 INFO L500 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:25,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:25,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:25,765 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1056472625, now seen corresponding path program 16 times [2022-03-18 12:42:25,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:25,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144584038] [2022-03-18 12:42:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:42:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144584038] [2022-03-18 12:42:26,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144584038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902214328] [2022-03-18 12:42:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:42:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:26,030 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 12:42:26,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:42:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 12:42:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:42:26,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:42:26,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902214328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:26,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:26,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 12:42:26,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548399160] [2022-03-18 12:42:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:26,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 12:42:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 12:42:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 12:42:26,628 INFO L87 Difference]: Start difference. First operand 402 states and 570 transitions. Second operand has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 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 12:42:50,484 WARN L232 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:43:11,103 WARN L232 SmtUtils]: Spent 13.12s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:43:36,736 WARN L232 SmtUtils]: Spent 9.99s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:43:56,019 WARN L232 SmtUtils]: Spent 13.47s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:44:19,892 WARN L232 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:44:21,949 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 4294967294 c_main_~z~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-03-18 12:44:35,235 WARN L232 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:44:51,846 WARN L232 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:45:05,272 WARN L232 SmtUtils]: Spent 9.79s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:45:21,161 WARN L232 SmtUtils]: Spent 7.79s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:45:32,429 WARN L232 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:46:10,216 WARN L232 SmtUtils]: Spent 11.83s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:47:22,328 WARN L232 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:49:34,238 WARN L232 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:49:43,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:49:45,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:49:58,191 WARN L232 SmtUtils]: Spent 7.84s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:50:08,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:50:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:10,926 INFO L93 Difference]: Finished difference Result 1334 states and 1823 transitions. [2022-03-18 12:50:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-03-18 12:50:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 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 38 [2022-03-18 12:50:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:10,929 INFO L225 Difference]: With dead ends: 1334 [2022-03-18 12:50:10,929 INFO L226 Difference]: Without dead ends: 1227 [2022-03-18 12:50:10,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28575 ImplicationChecksByTransitivity, 447.4s TimeCoverageRelationStatistics Valid=14089, Invalid=56401, Unknown=4, NotChecked=528, Total=71022 [2022-03-18 12:50:10,934 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 1011 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 1844 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1844 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:10,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 134 Invalid, 3640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1844 Valid, 1793 Invalid, 2 Unknown, 1 Unchecked, 17.1s Time] [2022-03-18 12:50:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-03-18 12:50:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 483. [2022-03-18 12:50:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.4288702928870294) internal successors, (683), 478 states have internal predecessors, (683), 3 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 12:50:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 687 transitions. [2022-03-18 12:50:11,038 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 687 transitions. Word has length 38 [2022-03-18 12:50:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:11,038 INFO L478 AbstractCegarLoop]: Abstraction has 483 states and 687 transitions. [2022-03-18 12:50:11,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 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 12:50:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 687 transitions. [2022-03-18 12:50:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 12:50:11,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:11,039 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:11,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:11,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:11,239 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1036634024, now seen corresponding path program 17 times [2022-03-18 12:50:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076276653] [2022-03-18 12:50:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:11,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076276653] [2022-03-18 12:50:11,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076276653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139423284] [2022-03-18 12:50:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:50:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:11,769 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 12:50:12,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:50:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:12,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 12:50:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:13,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:14,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139423284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:14,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:14,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 57 [2022-03-18 12:50:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223300258] [2022-03-18 12:50:14,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:14,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 12:50:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 12:50:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 12:50:14,451 INFO L87 Difference]: Start difference. First operand 483 states and 687 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:20,103 INFO L93 Difference]: Finished difference Result 503 states and 707 transitions. [2022-03-18 12:50:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 12:50:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-18 12:50:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:20,105 INFO L225 Difference]: With dead ends: 503 [2022-03-18 12:50:20,105 INFO L226 Difference]: Without dead ends: 498 [2022-03-18 12:50:20,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=418, Invalid=7414, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 12:50:20,107 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:20,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 224 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 12:50:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-03-18 12:50:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 483. [2022-03-18 12:50:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.4288702928870294) internal successors, (683), 478 states have internal predecessors, (683), 3 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 12:50:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 687 transitions. [2022-03-18 12:50:20,220 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 687 transitions. Word has length 39 [2022-03-18 12:50:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:20,221 INFO L478 AbstractCegarLoop]: Abstraction has 483 states and 687 transitions. [2022-03-18 12:50:20,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 687 transitions. [2022-03-18 12:50:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 12:50:20,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:20,221 INFO L500 BasicCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:20,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:20,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 12:50:20,425 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 680681318, now seen corresponding path program 11 times [2022-03-18 12:50:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460540805] [2022-03-18 12:50:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:20,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:50:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460540805] [2022-03-18 12:50:20,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460540805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144627061] [2022-03-18 12:50:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:50:20,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:20,656 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:20,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 12:50:21,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 12:50:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 12:50:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:50:22,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-18 12:50:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144627061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:22,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:22,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-03-18 12:50:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269567450] [2022-03-18 12:50:22,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:22,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 12:50:22,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 12:50:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 12:50:22,669 INFO L87 Difference]: Start difference. First operand 483 states and 687 transitions. Second operand has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 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 12:50:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:28,154 INFO L93 Difference]: Finished difference Result 811 states and 1039 transitions. [2022-03-18 12:50:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 12:50:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 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 39 [2022-03-18 12:50:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:28,156 INFO L225 Difference]: With dead ends: 811 [2022-03-18 12:50:28,156 INFO L226 Difference]: Without dead ends: 770 [2022-03-18 12:50:28,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4674 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2634, Invalid=12128, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 12:50:28,157 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 328 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:28,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 125 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 12:50:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-18 12:50:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 497. [2022-03-18 12:50:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 492 states have (on average 1.4227642276422765) internal successors, (700), 492 states have internal predecessors, (700), 3 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 12:50:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 704 transitions. [2022-03-18 12:50:28,287 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 704 transitions. Word has length 39 [2022-03-18 12:50:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:28,288 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 704 transitions. [2022-03-18 12:50:28,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 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 12:50:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 704 transitions. [2022-03-18 12:50:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 12:50:28,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:28,288 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:28,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 12:50:28,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:28,490 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash -73295272, now seen corresponding path program 12 times [2022-03-18 12:50:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:28,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57163993] [2022-03-18 12:50:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:28,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57163993] [2022-03-18 12:50:28,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57163993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209297248] [2022-03-18 12:50:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:50:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:28,756 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:28,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 12:50:28,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:50:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 12:50:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:29,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:29,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209297248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:29,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:29,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2022-03-18 12:50:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223172650] [2022-03-18 12:50:29,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:29,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 12:50:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 12:50:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-03-18 12:50:29,175 INFO L87 Difference]: Start difference. First operand 497 states and 704 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 12:50:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:29,928 INFO L93 Difference]: Finished difference Result 528 states and 743 transitions. [2022-03-18 12:50:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 12:50:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 39 [2022-03-18 12:50:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:29,930 INFO L225 Difference]: With dead ends: 528 [2022-03-18 12:50:29,930 INFO L226 Difference]: Without dead ends: 523 [2022-03-18 12:50:29,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 12:50:29,931 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 156 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:29,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 91 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:50:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-18 12:50:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 493. [2022-03-18 12:50:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 488 states have (on average 1.415983606557377) internal successors, (691), 488 states have internal predecessors, (691), 3 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 12:50:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 695 transitions. [2022-03-18 12:50:30,069 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 695 transitions. Word has length 39 [2022-03-18 12:50:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:30,070 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 695 transitions. [2022-03-18 12:50:30,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 12:50:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 695 transitions. [2022-03-18 12:50:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 12:50:30,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:30,071 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:30,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 12:50:30,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:30,271 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2036388576, now seen corresponding path program 18 times [2022-03-18 12:50:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906409478] [2022-03-18 12:50:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:30,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 12:50:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906409478] [2022-03-18 12:50:30,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906409478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828022594] [2022-03-18 12:50:30,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:50:30,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:30,384 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:30,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 12:50:30,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:50:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 12:50:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 12:50:30,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-18 12:50:30,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828022594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:30,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:30,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-18 12:50:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811301077] [2022-03-18 12:50:30,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:30,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:50:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:50:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:50:30,623 INFO L87 Difference]: Start difference. First operand 493 states and 695 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 12:50:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:30,976 INFO L93 Difference]: Finished difference Result 520 states and 723 transitions. [2022-03-18 12:50:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 12:50:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 40 [2022-03-18 12:50:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:30,977 INFO L225 Difference]: With dead ends: 520 [2022-03-18 12:50:30,977 INFO L226 Difference]: Without dead ends: 492 [2022-03-18 12:50:30,978 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:50:30,978 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:30,978 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 72 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:50:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-18 12:50:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 486. [2022-03-18 12:50:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.4199584199584199) internal successors, (683), 481 states have internal predecessors, (683), 3 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 12:50:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2022-03-18 12:50:31,095 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 40 [2022-03-18 12:50:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:31,096 INFO L478 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2022-03-18 12:50:31,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 12:50:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2022-03-18 12:50:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 12:50:31,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:31,096 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:31,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-18 12:50:31,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 12:50:31,300 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash 20764672, now seen corresponding path program 13 times [2022-03-18 12:50:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:31,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185429973] [2022-03-18 12:50:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:31,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185429973] [2022-03-18 12:50:31,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185429973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671352968] [2022-03-18 12:50:31,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:50:31,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:31,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:31,528 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:31,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 12:50:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 12:50:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:31,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:50:32,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671352968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:32,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:32,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-03-18 12:50:32,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043779121] [2022-03-18 12:50:32,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:32,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 12:50:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 12:50:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:50:32,362 INFO L87 Difference]: Start difference. First operand 486 states and 687 transitions. Second operand has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 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 12:50:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:43,469 INFO L93 Difference]: Finished difference Result 914 states and 1149 transitions. [2022-03-18 12:50:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 12:50:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 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 40 [2022-03-18 12:50:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:43,471 INFO L225 Difference]: With dead ends: 914 [2022-03-18 12:50:43,471 INFO L226 Difference]: Without dead ends: 840 [2022-03-18 12:50:43,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6582 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3557, Invalid=16465, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 12:50:43,473 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 392 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:43,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 130 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 12:50:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-18 12:50:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 517. [2022-03-18 12:50:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 512 states have (on average 1.396484375) internal successors, (715), 512 states have internal predecessors, (715), 3 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 12:50:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 719 transitions. [2022-03-18 12:50:43,611 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 719 transitions. Word has length 40 [2022-03-18 12:50:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:43,611 INFO L478 AbstractCegarLoop]: Abstraction has 517 states and 719 transitions. [2022-03-18 12:50:43,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 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 12:50:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 719 transitions. [2022-03-18 12:50:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 12:50:43,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:43,612 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:43,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:43,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 12:50:43,812 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 14953136, now seen corresponding path program 14 times [2022-03-18 12:50:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969653271] [2022-03-18 12:50:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:44,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 12:50:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969653271] [2022-03-18 12:50:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969653271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205517418] [2022-03-18 12:50:44,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:50:44,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:44,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:44,052 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:44,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 12:50:44,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:50:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 12:50:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 12:50:44,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 12:50:44,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205517418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:44,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:44,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-03-18 12:50:44,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198647578] [2022-03-18 12:50:44,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:44,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 12:50:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 12:50:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-03-18 12:50:44,364 INFO L87 Difference]: Start difference. First operand 517 states and 719 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 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 12:50:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:45,255 INFO L93 Difference]: Finished difference Result 534 states and 746 transitions. [2022-03-18 12:50:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 12:50:45,256 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 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 42 [2022-03-18 12:50:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:45,257 INFO L225 Difference]: With dead ends: 534 [2022-03-18 12:50:45,257 INFO L226 Difference]: Without dead ends: 529 [2022-03-18 12:50:45,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:50:45,257 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 125 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:45,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 99 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:50:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-18 12:50:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 512. [2022-03-18 12:50:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.388560157790927) internal successors, (704), 507 states have internal predecessors, (704), 3 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 12:50:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 708 transitions. [2022-03-18 12:50:45,393 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 708 transitions. Word has length 42 [2022-03-18 12:50:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:45,394 INFO L478 AbstractCegarLoop]: Abstraction has 512 states and 708 transitions. [2022-03-18 12:50:45,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 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 12:50:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 708 transitions. [2022-03-18 12:50:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 12:50:45,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:45,394 INFO L500 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:45,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:45,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 12:50:45,595 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash -356492863, now seen corresponding path program 19 times [2022-03-18 12:50:45,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:45,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781249081] [2022-03-18 12:50:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 12:50:45,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:45,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781249081] [2022-03-18 12:50:45,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781249081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:45,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440728554] [2022-03-18 12:50:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:50:45,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:45,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:45,895 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:45,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 12:50:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 12:50:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 12:50:46,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 12:50:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440728554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:46,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:46,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-18 12:50:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217366579] [2022-03-18 12:50:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:46,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 12:50:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 12:50:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 12:50:46,625 INFO L87 Difference]: Start difference. First operand 512 states and 708 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 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 12:51:19,369 WARN L232 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:51:38,918 WARN L232 SmtUtils]: Spent 9.73s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:51:41,336 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 4294967294 c_main_~z~0) 4294967296)) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967292 c_main_~z~0) 4294967296)) (< 0 (mod (+ 4294967292 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 4294967293 c_main_~z~0) 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-03-18 12:52:26,449 WARN L232 SmtUtils]: Spent 21.01s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)