/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/nla-digbench-scaling/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-04 22:44:26,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 22:44:26,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 22:44:26,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 22:44:26,687 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 [2022-04-04 22:44:26,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 22:44:26,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 22:44:26,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 22:44:26,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 22:44:26,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 22:44:26,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 22:44:26,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 22:44:26,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 22:44:26,717 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 22:44:26,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 22:44:26,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 22:44:26,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 22:44:26,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 22:44:26,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 22:44:26,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 22:44:26,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 22:44:26,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 22:44:26,720 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 22:44:26,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 22:44:26,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 22:44:26,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 22:44:26,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 22:44:26,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 22:44:26,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 22:44:26,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 22:44:26,722 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 22:44:26,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 22:44:26,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 22:44:26,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 22:44:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 22:44:26,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 22:44:26,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 22:44:26,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 22:44:26,924 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 22:44:26,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-04-04 22:44:26,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd795a181/585669ba7b0a442cac65ae6779c517f3/FLAGc99322058 [2022-04-04 22:44:27,286 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 22:44:27,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-04-04 22:44:27,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd795a181/585669ba7b0a442cac65ae6779c517f3/FLAGc99322058 [2022-04-04 22:44:27,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd795a181/585669ba7b0a442cac65ae6779c517f3 [2022-04-04 22:44:27,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 22:44:27,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 22:44:27,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 22:44:27,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 22:44:27,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 22:44:27,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543e8827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27, skipping insertion in model container [2022-04-04 22:44:27,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 22:44:27,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 22:44:27,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2022-04-04 22:44:27,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 22:44:27,888 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 22:44:27,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2022-04-04 22:44:27,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 22:44:27,922 INFO L208 MainTranslator]: Completed translation [2022-04-04 22:44:27,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27 WrapperNode [2022-04-04 22:44:27,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 22:44:27,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 22:44:27,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 22:44:27,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 22:44:27,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 22:44:27,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 22:44:27,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 22:44:27,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 22:44:27,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (1/1) ... [2022-04-04 22:44:27,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 22:44:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:28,001 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) [2022-04-04 22:44:28,011 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 [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 22:44:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 22:44:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 22:44:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 22:44:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 22:44:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 22:44:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 22:44:28,087 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 22:44:28,089 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 22:44:28,208 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 22:44:28,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 22:44:28,212 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-04 22:44:28,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 10:44:28 BoogieIcfgContainer [2022-04-04 22:44:28,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 22:44:28,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 22:44:28,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 22:44:28,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 22:44:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 10:44:27" (1/3) ... [2022-04-04 22:44:28,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f56371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 10:44:28, skipping insertion in model container [2022-04-04 22:44:28,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 10:44:27" (2/3) ... [2022-04-04 22:44:28,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f56371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 10:44:28, skipping insertion in model container [2022-04-04 22:44:28,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 10:44:28" (3/3) ... [2022-04-04 22:44:28,220 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2022-04-04 22:44:28,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 22:44:28,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 22:44:28,258 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 22:44:28,263 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 [2022-04-04 22:44:28,264 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 22:44:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-04 22:44:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-04 22:44:28,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:28,294 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:28,294 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2022-04-04 22:44:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:28,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953962476] [2022-04-04 22:44:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:28,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 22:44:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-04 22:44:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:28,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953962476] [2022-04-04 22:44:28,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953962476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 22:44:28,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 22:44:28,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-04 22:44:28,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395362891] [2022-04-04 22:44:28,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:28,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-04 22:44:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-04 22:44:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 22:44:28,548 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-04 22:44:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:28,618 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-04-04 22:44:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-04 22:44:28,620 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-04 22:44:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:28,627 INFO L225 Difference]: With dead ends: 56 [2022-04-04 22:44:28,627 INFO L226 Difference]: Without dead ends: 28 [2022-04-04 22:44:28,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 22:44:28,636 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:28,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 22:44:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-04 22:44:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-04 22:44:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 22:44:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-04 22:44:28,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-04-04 22:44:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:28,665 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-04 22:44:28,665 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-04 22:44:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-04 22:44:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-04 22:44:28,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:28,667 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:28,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-04 22:44:28,668 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2022-04-04 22:44:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295395081] [2022-04-04 22:44:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:28,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324624989] [2022-04-04 22:44:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:28,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:28,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:28,691 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) [2022-04-04 22:44:28,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 22:44:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-04 22:44:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:28,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 22:44:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:28,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295395081] [2022-04-04 22:44:28,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324624989] [2022-04-04 22:44:28,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324624989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 22:44:28,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 22:44:28,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-04 22:44:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966483248] [2022-04-04 22:44:28,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:28,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-04 22:44:28,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-04 22:44:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 22:44:28,838 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 22:44:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:28,849 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-04-04 22:44:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-04 22:44:28,850 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-04 22:44:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:28,851 INFO L225 Difference]: With dead ends: 37 [2022-04-04 22:44:28,851 INFO L226 Difference]: Without dead ends: 29 [2022-04-04 22:44:28,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 22:44:28,852 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:28,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 22:44:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-04 22:44:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-04 22:44:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 22:44:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-04 22:44:28,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-04-04 22:44:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:28,859 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-04 22:44:28,860 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 22:44:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-04 22:44:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-04 22:44:28,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:28,860 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:28,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:29,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:29,084 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2022-04-04 22:44:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94051090] [2022-04-04 22:44:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:29,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662138253] [2022-04-04 22:44:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:29,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:29,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:29,104 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) [2022-04-04 22:44:29,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 22:44:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-04 22:44:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:29,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 22:44:29,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94051090] [2022-04-04 22:44:29,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662138253] [2022-04-04 22:44:29,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662138253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 22:44:29,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 22:44:29,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-04 22:44:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543820106] [2022-04-04 22:44:29,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:29,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-04 22:44:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-04 22:44:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-04 22:44:29,249 INFO L87 Difference]: Start difference. First operand 29 states and 35 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-04 22:44:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:29,319 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-04-04 22:44:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-04 22:44:29,323 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-04 22:44:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:29,325 INFO L225 Difference]: With dead ends: 42 [2022-04-04 22:44:29,326 INFO L226 Difference]: Without dead ends: 40 [2022-04-04 22:44:29,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-04 22:44:29,329 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:29,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 22:44:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-04 22:44:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-04-04 22:44:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-04 22:44:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-04-04 22:44:29,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-04-04 22:44:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:29,341 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-04-04 22:44:29,341 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-04 22:44:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-04 22:44:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-04 22:44:29,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:29,342 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:29,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:29,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-04 22:44:29,543 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2022-04-04 22:44:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937425311] [2022-04-04 22:44:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:29,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849799937] [2022-04-04 22:44:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:29,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:29,561 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) [2022-04-04 22:44:29,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 22:44:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-04 22:44:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:29,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 22:44:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:30,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937425311] [2022-04-04 22:44:30,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849799937] [2022-04-04 22:44:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849799937] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 22:44:30,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 22:44:30,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-04 22:44:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019061737] [2022-04-04 22:44:30,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 22:44:30,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-04 22:44:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-04 22:44:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-04 22:44:30,161 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-04 22:44:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:30,507 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-04-04 22:44:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-04 22:44:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-04-04 22:44:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:30,510 INFO L225 Difference]: With dead ends: 55 [2022-04-04 22:44:30,510 INFO L226 Difference]: Without dead ends: 53 [2022-04-04 22:44:30,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-04 22:44:30,511 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:30,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-04 22:44:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-04 22:44:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-04-04 22:44:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-04 22:44:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-04-04 22:44:30,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-04-04 22:44:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:30,523 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-04-04 22:44:30,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-04 22:44:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-04-04 22:44:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-04 22:44:30,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:30,524 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:30,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:30,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:30,747 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2022-04-04 22:44:30,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:30,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719772901] [2022-04-04 22:44:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:30,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:30,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:30,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613172100] [2022-04-04 22:44:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:30,760 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) [2022-04-04 22:44:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-04 22:44:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:30,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-04 22:44:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:30,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 22:44:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719772901] [2022-04-04 22:44:30,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613172100] [2022-04-04 22:44:30,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613172100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 22:44:30,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 22:44:30,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-04 22:44:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629304099] [2022-04-04 22:44:30,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 22:44:30,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-04 22:44:30,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-04 22:44:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-04 22:44:30,920 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-04 22:44:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:30,978 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-04-04 22:44:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-04 22:44:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-04-04 22:44:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:30,980 INFO L225 Difference]: With dead ends: 103 [2022-04-04 22:44:30,980 INFO L226 Difference]: Without dead ends: 93 [2022-04-04 22:44:30,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-04 22:44:30,981 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:30,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 22:44:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-04 22:44:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-04-04 22:44:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-04 22:44:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-04-04 22:44:31,000 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-04-04 22:44:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:31,000 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-04-04 22:44:31,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-04 22:44:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-04-04 22:44:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-04 22:44:31,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:31,001 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:31,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:31,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:31,223 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2022-04-04 22:44:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:31,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242611162] [2022-04-04 22:44:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:31,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:31,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498416388] [2022-04-04 22:44:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:31,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:31,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:31,251 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) [2022-04-04 22:44:31,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-04 22:44:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-04 22:44:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:31,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 22:44:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:33,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242611162] [2022-04-04 22:44:33,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:33,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498416388] [2022-04-04 22:44:33,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498416388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 22:44:33,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 22:44:33,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-04-04 22:44:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557666925] [2022-04-04 22:44:33,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 22:44:33,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-04 22:44:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-04 22:44:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-04 22:44:33,043 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-04 22:44:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:35,012 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-04-04 22:44:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-04 22:44:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-04-04 22:44:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:35,014 INFO L225 Difference]: With dead ends: 127 [2022-04-04 22:44:35,014 INFO L226 Difference]: Without dead ends: 121 [2022-04-04 22:44:35,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-04-04 22:44:35,015 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:35,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 187 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-04 22:44:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-04 22:44:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-04-04 22:44:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-04 22:44:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-04-04 22:44:35,035 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-04-04 22:44:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:35,036 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-04-04 22:44:35,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-04 22:44:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-04-04 22:44:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-04 22:44:35,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:35,037 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:35,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:35,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:35,251 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1613968938, now seen corresponding path program 1 times [2022-04-04 22:44:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669913070] [2022-04-04 22:44:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:35,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410035468] [2022-04-04 22:44:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:35,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:35,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:35,268 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) [2022-04-04 22:44:35,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-04 22:44:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-04 22:44:35,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 22:44:35,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 22:44:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669913070] [2022-04-04 22:44:35,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410035468] [2022-04-04 22:44:35,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410035468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 22:44:35,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 22:44:35,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-04 22:44:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129583415] [2022-04-04 22:44:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:35,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-04 22:44:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-04 22:44:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-04 22:44:35,377 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 22:44:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:35,481 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-04-04 22:44:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-04 22:44:35,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-04-04 22:44:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:35,483 INFO L225 Difference]: With dead ends: 116 [2022-04-04 22:44:35,483 INFO L226 Difference]: Without dead ends: 104 [2022-04-04 22:44:35,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-04 22:44:35,484 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:35,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 22:44:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-04 22:44:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-04-04 22:44:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-04 22:44:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-04-04 22:44:35,499 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-04-04 22:44:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:35,499 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-04-04 22:44:35,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 22:44:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-04-04 22:44:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-04 22:44:35,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:35,500 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:35,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:35,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:35,723 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1524039145, now seen corresponding path program 1 times [2022-04-04 22:44:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635858163] [2022-04-04 22:44:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:35,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103667934] [2022-04-04 22:44:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:35,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:35,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:35,734 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) [2022-04-04 22:44:35,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-04 22:44:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-04 22:44:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-04 22:44:35,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 22:44:35,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635858163] [2022-04-04 22:44:35,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103667934] [2022-04-04 22:44:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103667934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 22:44:35,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 22:44:35,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-04 22:44:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842180587] [2022-04-04 22:44:35,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:35,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-04 22:44:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-04 22:44:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-04 22:44:35,871 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-04 22:44:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:35,935 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-04-04 22:44:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-04 22:44:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-04-04 22:44:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:35,936 INFO L225 Difference]: With dead ends: 141 [2022-04-04 22:44:35,936 INFO L226 Difference]: Without dead ends: 129 [2022-04-04 22:44:35,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-04 22:44:35,937 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:35,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 22:44:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-04 22:44:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-04-04 22:44:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-04 22:44:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-04-04 22:44:35,954 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-04-04 22:44:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:35,954 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-04-04 22:44:35,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-04 22:44:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-04-04 22:44:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-04 22:44:35,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:35,956 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:35,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:36,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:36,171 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash -470105561, now seen corresponding path program 1 times [2022-04-04 22:44:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829084386] [2022-04-04 22:44:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:36,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557239387] [2022-04-04 22:44:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:36,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:36,181 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) [2022-04-04 22:44:36,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-04 22:44:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 22:44:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-04 22:44:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:36,344 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 22:44:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-04 22:44:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 22:44:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-04 22:44:36,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829084386] [2022-04-04 22:44:36,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557239387] [2022-04-04 22:44:36,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557239387] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-04 22:44:36,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-04 22:44:36,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-04 22:44:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300341525] [2022-04-04 22:44:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 22:44:36,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-04 22:44:36,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:36,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-04 22:44:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-04 22:44:36,477 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-04 22:44:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:36,610 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2022-04-04 22:44:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-04 22:44:36,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-04 22:44:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:36,612 INFO L225 Difference]: With dead ends: 120 [2022-04-04 22:44:36,612 INFO L226 Difference]: Without dead ends: 100 [2022-04-04 22:44:36,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-04 22:44:36,613 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:36,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 22:44:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-04 22:44:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-04-04 22:44:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-04 22:44:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-04-04 22:44:36,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-04-04 22:44:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:36,622 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-04-04 22:44:36,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-04 22:44:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-04-04 22:44:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-04 22:44:36,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:36,623 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:36,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:36,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-04 22:44:36,846 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1818717446, now seen corresponding path program 2 times [2022-04-04 22:44:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:36,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418940772] [2022-04-04 22:44:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:36,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676993681] [2022-04-04 22:44:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 22:44:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:36,856 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) [2022-04-04 22:44:36,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-04 22:44:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 22:44:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 22:44:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-04 22:44:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 22:44:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 22:44:37,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 22:44:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-04 22:44:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 22:44:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418940772] [2022-04-04 22:44:37,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 22:44:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676993681] [2022-04-04 22:44:37,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676993681] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 22:44:37,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 22:44:37,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-04 22:44:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224897064] [2022-04-04 22:44:37,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 22:44:37,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-04 22:44:37,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 22:44:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-04 22:44:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-04 22:44:37,172 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-04 22:44:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 22:44:37,335 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2022-04-04 22:44:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-04 22:44:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 54 [2022-04-04 22:44:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 22:44:37,340 INFO L225 Difference]: With dead ends: 140 [2022-04-04 22:44:37,340 INFO L226 Difference]: Without dead ends: 132 [2022-04-04 22:44:37,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-04 22:44:37,341 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 22:44:37,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 22:44:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-04 22:44:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-04 22:44:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-04 22:44:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-04-04 22:44:37,366 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 54 [2022-04-04 22:44:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 22:44:37,366 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-04-04 22:44:37,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-04 22:44:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-04-04 22:44:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-04 22:44:37,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 22:44:37,369 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 22:44:37,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-04 22:44:37,575 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,SelfDestructingSolverStorable9 [2022-04-04 22:44:37,575 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 22:44:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 22:44:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1397474810, now seen corresponding path program 3 times [2022-04-04 22:44:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 22:44:37,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105568776] [2022-04-04 22:44:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 22:44:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 22:44:37,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 22:44:37,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725134397] [2022-04-04 22:44:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 22:44:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 22:44:37,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 22:44:37,587 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) [2022-04-04 22:44:37,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process