/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/array-programs/partial_mod_count_limited_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:55:35,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:55:35,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:55:35,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:55:35,390 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 [2022-01-30 22:55:35,410 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:55:35,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:55:35,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:55:35,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:55:35,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:55:35,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:55:35,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:55:35,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:55:35,412 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:55:35,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:55:35,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:55:35,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:55:35,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:55:35,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:55:35,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:55:35,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:55:35,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:55:35,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:55:35,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:55:35,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:55:35,653 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:55:35,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c [2022-01-30 22:55:35,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b009f2d/8e242adc59084aafbcd4b797d7dcceba/FLAGdbc27ef1a [2022-01-30 22:55:36,051 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:55:36,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c [2022-01-30 22:55:36,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b009f2d/8e242adc59084aafbcd4b797d7dcceba/FLAGdbc27ef1a [2022-01-30 22:55:36,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b009f2d/8e242adc59084aafbcd4b797d7dcceba [2022-01-30 22:55:36,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:55:36,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:55:36,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:55:36,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:55:36,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:55:36,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2774b39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36, skipping insertion in model container [2022-01-30 22:55:36,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:55:36,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:55:36,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c[331,344] [2022-01-30 22:55:36,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:55:36,699 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:55:36,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c[331,344] [2022-01-30 22:55:36,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:55:36,739 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:55:36,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36 WrapperNode [2022-01-30 22:55:36,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:55:36,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:55:36,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:55:36,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:55:36,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:55:36,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:55:36,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:55:36,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:55:36,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (1/1) ... [2022-01-30 22:55:36,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:55:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:36,808 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) [2022-01-30 22:55:36,833 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 [2022-01-30 22:55:36,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:55:36,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:55:36,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:55:36,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:55:36,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:55:36,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:55:36,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:55:36,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:55:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:55:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:55:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:55:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:55:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:55:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:55:36,930 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:55:36,933 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:55:37,107 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:55:37,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:55:37,112 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:55:37,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:55:37 BoogieIcfgContainer [2022-01-30 22:55:37,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:55:37,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:55:37,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:55:37,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:55:37,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:55:36" (1/3) ... [2022-01-30 22:55:37,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc823a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:55:37, skipping insertion in model container [2022-01-30 22:55:37,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:36" (2/3) ... [2022-01-30 22:55:37,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc823a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:55:37, skipping insertion in model container [2022-01-30 22:55:37,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:55:37" (3/3) ... [2022-01-30 22:55:37,119 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.c [2022-01-30 22:55:37,123 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:55:37,123 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:55:37,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:55:37,175 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:55:37,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:55:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:55:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:55:37,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:37,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:37,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2033071227, now seen corresponding path program 1 times [2022-01-30 22:55:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794296923] [2022-01-30 22:55:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:37,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:37,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292413542] [2022-01-30 22:55:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:37,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:37,299 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) [2022-01-30 22:55:37,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:55:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:55:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:37,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:37,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794296923] [2022-01-30 22:55:37,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292413542] [2022-01-30 22:55:37,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292413542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:37,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:37,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:55:37,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785619161] [2022-01-30 22:55:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:37,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:55:37,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:55:37,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:55:37,506 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:55:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:37,522 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-30 22:55:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:55:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 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 20 [2022-01-30 22:55:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:37,529 INFO L225 Difference]: With dead ends: 57 [2022-01-30 22:55:37,529 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 22:55:37,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:55:37,535 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:37,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:55:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 22:55:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-30 22:55:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 22:55:37,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-30 22:55:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:37,571 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 22:55:37,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:55:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 22:55:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:55:37,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:37,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:37,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:37,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:55:37,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2003730631, now seen corresponding path program 1 times [2022-01-30 22:55:37,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:37,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398314946] [2022-01-30 22:55:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:37,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:37,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:37,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428883121] [2022-01-30 22:55:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:37,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:37,824 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) [2022-01-30 22:55:37,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:55:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:55:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:37,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:37,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398314946] [2022-01-30 22:55:37,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428883121] [2022-01-30 22:55:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428883121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:37,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:37,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:55:37,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932913435] [2022-01-30 22:55:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:37,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:55:37,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:55:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:55:37,957 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 22:55:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:38,005 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-01-30 22:55:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:55:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-01-30 22:55:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:38,007 INFO L225 Difference]: With dead ends: 53 [2022-01-30 22:55:38,007 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:55:38,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:55:38,009 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:38,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:55:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:55:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-30 22:55:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-30 22:55:38,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-30 22:55:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:38,017 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-30 22:55:38,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 22:55:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-30 22:55:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 22:55:38,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:38,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:38,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:38,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 22:55:38,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1543382071, now seen corresponding path program 1 times [2022-01-30 22:55:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513350115] [2022-01-30 22:55:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:38,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:38,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305189287] [2022-01-30 22:55:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:38,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:38,259 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) [2022-01-30 22:55:38,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:55:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:55:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:38,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:38,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513350115] [2022-01-30 22:55:38,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305189287] [2022-01-30 22:55:38,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305189287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:38,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:38,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:55:38,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324685601] [2022-01-30 22:55:38,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:38,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:55:38,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:55:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:55:38,500 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:38,631 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2022-01-30 22:55:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:55:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-30 22:55:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:38,636 INFO L225 Difference]: With dead ends: 73 [2022-01-30 22:55:38,637 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 22:55:38,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:55:38,640 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:38,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:55:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 22:55:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-30 22:55:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-30 22:55:38,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-30 22:55:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:38,657 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-30 22:55:38,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-30 22:55:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:55:38,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:38,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:38,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:38,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:38,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 156886521, now seen corresponding path program 1 times [2022-01-30 22:55:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:38,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674553349] [2022-01-30 22:55:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:38,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:38,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:38,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155306859] [2022-01-30 22:55:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:38,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:38,912 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) [2022-01-30 22:55:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:55:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 22:55:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:39,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:39,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674553349] [2022-01-30 22:55:39,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155306859] [2022-01-30 22:55:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155306859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:39,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 22:55:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732913786] [2022-01-30 22:55:39,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 22:55:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 22:55:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 22:55:39,503 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:39,768 INFO L93 Difference]: Finished difference Result 131 states and 180 transitions. [2022-01-30 22:55:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 22:55:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-30 22:55:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:39,770 INFO L225 Difference]: With dead ends: 131 [2022-01-30 22:55:39,770 INFO L226 Difference]: Without dead ends: 111 [2022-01-30 22:55:39,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 22:55:39,771 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 238 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:39,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 70 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:55:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-30 22:55:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-30 22:55:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-30 22:55:39,781 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-30 22:55:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:39,781 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-30 22:55:39,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-30 22:55:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-30 22:55:39,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:39,783 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:39,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:39,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:39,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -476238917, now seen corresponding path program 2 times [2022-01-30 22:55:39,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:39,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932037348] [2022-01-30 22:55:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:39,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:40,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616380912] [2022-01-30 22:55:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:55:40,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:40,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:40,018 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) [2022-01-30 22:55:40,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:55:40,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 22:55:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:40,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-30 22:55:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-30 22:55:40,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:40,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932037348] [2022-01-30 22:55:40,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616380912] [2022-01-30 22:55:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616380912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:40,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:40,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-30 22:55:40,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144597664] [2022-01-30 22:55:40,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:40,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-30 22:55:40,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-30 22:55:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:55:40,514 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:40,634 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-01-30 22:55:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:55:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-30 22:55:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:40,636 INFO L225 Difference]: With dead ends: 88 [2022-01-30 22:55:40,636 INFO L226 Difference]: Without dead ends: 86 [2022-01-30 22:55:40,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-30 22:55:40,637 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:40,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:55:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-30 22:55:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-30 22:55:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-30 22:55:40,648 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-30 22:55:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:40,648 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-30 22:55:40,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-30 22:55:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 22:55:40,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:40,651 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:40,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:40,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:40,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1825589254, now seen corresponding path program 1 times [2022-01-30 22:55:40,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430521283] [2022-01-30 22:55:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:40,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:40,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:40,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226657546] [2022-01-30 22:55:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:40,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:40,898 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) [2022-01-30 22:55:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:55:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:55:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:55:41,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:55:41,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430521283] [2022-01-30 22:55:41,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226657546] [2022-01-30 22:55:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226657546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:41,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:41,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 22:55:41,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865147663] [2022-01-30 22:55:41,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:41,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:55:41,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:55:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:55:41,651 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:42,314 INFO L93 Difference]: Finished difference Result 440 states and 632 transitions. [2022-01-30 22:55:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:55:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-30 22:55:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:42,317 INFO L225 Difference]: With dead ends: 440 [2022-01-30 22:55:42,317 INFO L226 Difference]: Without dead ends: 393 [2022-01-30 22:55:42,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:55:42,319 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 605 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:42,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 147 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:55:42,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-30 22:55:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-30 22:55:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-30 22:55:42,354 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-30 22:55:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:42,355 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-30 22:55:42,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-30 22:55:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-30 22:55:42,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:42,357 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:42,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:42,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:42,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1125932218, now seen corresponding path program 2 times [2022-01-30 22:55:42,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391641079] [2022-01-30 22:55:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:42,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:42,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:42,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618970755] [2022-01-30 22:55:42,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:55:42,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:42,640 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) [2022-01-30 22:55:42,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:55:42,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:55:42,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:55:42,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:55:43,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:55:44,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391641079] [2022-01-30 22:55:44,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618970755] [2022-01-30 22:55:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618970755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:44,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-30 22:55:44,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375900600] [2022-01-30 22:55:44,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:44,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 22:55:44,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 22:55:44,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:55:44,505 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:46,511 INFO L93 Difference]: Finished difference Result 878 states and 1280 transitions. [2022-01-30 22:55:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 22:55:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-30 22:55:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:46,520 INFO L225 Difference]: With dead ends: 878 [2022-01-30 22:55:46,520 INFO L226 Difference]: Without dead ends: 801 [2022-01-30 22:55:46,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-30 22:55:46,525 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1114 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:46,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 254 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-30 22:55:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-30 22:55:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-30 22:55:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-30 22:55:46,577 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-30 22:55:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:46,578 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-30 22:55:46,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-30 22:55:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-30 22:55:46,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:46,581 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:46,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:46,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -284584390, now seen corresponding path program 3 times [2022-01-30 22:55:46,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151936775] [2022-01-30 22:55:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:46,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:46,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458908420] [2022-01-30 22:55:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:55:46,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:46,840 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) [2022-01-30 22:55:46,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:55:47,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 22:55:47,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:47,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:55:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:55:48,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:56:14,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151936775] [2022-01-30 22:56:14,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458908420] [2022-01-30 22:56:14,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458908420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:14,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:14,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-30 22:56:14,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034182367] [2022-01-30 22:56:14,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:14,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:56:14,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:56:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=86, Unknown=9, NotChecked=0, Total=132 [2022-01-30 22:56:14,653 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:56:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:25,426 INFO L93 Difference]: Finished difference Result 288 states and 369 transitions. [2022-01-30 22:56:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-30 22:56:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-30 22:56:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:25,429 INFO L225 Difference]: With dead ends: 288 [2022-01-30 22:56:25,429 INFO L226 Difference]: Without dead ends: 286 [2022-01-30 22:56:25,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=79, Invalid=179, Unknown=14, NotChecked=0, Total=272 [2022-01-30 22:56:25,430 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 127 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:25,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 144 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:56:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-30 22:56:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-30 22:56:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.288888888888889) internal successors, (348), 270 states have internal predecessors, (348), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:56:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2022-01-30 22:56:25,456 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 258 [2022-01-30 22:56:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:25,456 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2022-01-30 22:56:25,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:56:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2022-01-30 22:56:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-30 22:56:25,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:25,459 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:25,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-30 22:56:25,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 22:56:25,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 770830646, now seen corresponding path program 4 times [2022-01-30 22:56:25,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:25,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113388282] [2022-01-30 22:56:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:25,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:25,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:25,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051688648] [2022-01-30 22:56:25,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:56:25,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:25,698 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) [2022-01-30 22:56:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:56:30,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:56:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:56:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 22:56:30,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:56:32,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-30 22:56:35,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113388282] [2022-01-30 22:56:35,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051688648] [2022-01-30 22:56:35,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051688648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:35,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:35,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-30 22:56:35,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039040404] [2022-01-30 22:56:35,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:35,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-30 22:56:35,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-30 22:56:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-30 22:56:35,826 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:46,291 INFO L93 Difference]: Finished difference Result 3222 states and 4770 transitions. [2022-01-30 22:56:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-30 22:56:46,293 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-30 22:56:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:46,306 INFO L225 Difference]: With dead ends: 3222 [2022-01-30 22:56:46,306 INFO L226 Difference]: Without dead ends: 3065 [2022-01-30 22:56:46,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-30 22:56:46,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2929 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:46,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2976 Valid, 446 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-30 22:56:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-30 22:56:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 526. [2022-01-30 22:56:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 510 states have (on average 1.2941176470588236) internal successors, (660), 510 states have internal predecessors, (660), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:56:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 679 transitions. [2022-01-30 22:56:46,433 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 679 transitions. Word has length 290 [2022-01-30 22:56:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:46,434 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 679 transitions. [2022-01-30 22:56:46,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 679 transitions. [2022-01-30 22:56:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-30 22:56:46,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:46,442 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:46,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-30 22:56:46,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:46,656 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1283466294, now seen corresponding path program 5 times [2022-01-30 22:56:46,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891851296] [2022-01-30 22:56:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:46,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:46,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425517527] [2022-01-30 22:56:46,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:56:46,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:46,727 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) [2022-01-30 22:56:46,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process