/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:51:02,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:51:02,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:51:02,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 20:51:02,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 20:51:02,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 20:51:02,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 20:51:02,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 20:51:02,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 20:51:02,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 20:51:02,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 20:51:02,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 20:51:02,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 20:51:02,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 20:51:02,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 20:51:02,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 20:51:02,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 20:51:02,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 20:51:02,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 20:51:02,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 20:51:02,726 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 20:51:02,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 20:51:02,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 20:51:02,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 20:51:02,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 20:51:02,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 20:51:02,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:51:02,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:51:02,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:51:02,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:51:02,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:51:02,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:51:02,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:51:02,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:51:02,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:51:02,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:51:02,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:51:02,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:51:02,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:51:02,758 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:51:02,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:51:02,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:51:02,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:51:02,759 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:51:02,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:51:03,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:51:03,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:51:03,007 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:51:03,008 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:51:03,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-20 20:51:03,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a21c3f0/100b943bf33646c3876f837105a4610d/FLAGfd7476c53 [2022-03-20 20:51:03,386 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:51:03,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-03-20 20:51:03,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a21c3f0/100b943bf33646c3876f837105a4610d/FLAGfd7476c53 [2022-03-20 20:51:03,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a21c3f0/100b943bf33646c3876f837105a4610d [2022-03-20 20:51:03,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:51:03,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:51:03,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:51:03,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:51:03,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:51:03,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:03" (1/1) ... [2022-03-20 20:51:03,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152de48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:03, skipping insertion in model container [2022-03-20 20:51:03,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:03" (1/1) ... [2022-03-20 20:51:03,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:51:03,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:51:03,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-03-20 20:51:04,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:51:04,036 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:51:04,045 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-03-20 20:51:04,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:51:04,074 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:51:04,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04 WrapperNode [2022-03-20 20:51:04,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:51:04,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:51:04,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:51:04,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:51:04,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:51:04,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:51:04,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:51:04,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:51:04,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (1/1) ... [2022-03-20 20:51:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:51:04,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:04,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 20:51:04,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 20:51:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:51:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:51:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:51:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:51:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:51:04,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:51:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:51:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:51:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:51:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:51:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:51:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:51:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:51:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:51:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:51:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:51:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:51:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:51:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:51:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:51:04,226 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:51:04,227 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:51:04,386 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:51:04,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:51:04,391 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 20:51:04,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:04 BoogieIcfgContainer [2022-03-20 20:51:04,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:51:04,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:51:04,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:51:04,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:51:04,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:51:03" (1/3) ... [2022-03-20 20:51:04,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45181cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:51:04, skipping insertion in model container [2022-03-20 20:51:04,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:04" (2/3) ... [2022-03-20 20:51:04,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45181cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:51:04, skipping insertion in model container [2022-03-20 20:51:04,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:04" (3/3) ... [2022-03-20 20:51:04,398 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-03-20 20:51:04,402 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:51:04,402 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:51:04,431 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:51:04,435 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 20:51:04,435 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:51:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 20:51:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 20:51:04,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:04,463 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:04,464 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:04,468 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-20 20:51:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368155951] [2022-03-20 20:51:04,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-20 20:51:04,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:04,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554061172] [2022-03-20 20:51:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:51:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:51:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:51:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:51:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:51:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 20:51:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 20:51:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:51:04,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:04,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554061172] [2022-03-20 20:51:04,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554061172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:04,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:04,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:51:04,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:04,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368155951] [2022-03-20 20:51:04,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368155951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:04,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:04,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:51:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621456911] [2022-03-20 20:51:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:04,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:51:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:51:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:51:04,718 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:51:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:04,803 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-20 20:51:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:51:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 20:51:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:04,811 INFO L225 Difference]: With dead ends: 73 [2022-03-20 20:51:04,811 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 20:51:04,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:51:04,816 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:04,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 20:51:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 20:51:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:51:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 20:51:04,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 20:51:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:04,846 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 20:51:04,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:51:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 20:51:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:51:04,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:04,848 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:04,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:51:04,848 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-20 20:51:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229933442] [2022-03-20 20:51:04,850 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-20 20:51:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576779928] [2022-03-20 20:51:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:04,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283980596] [2022-03-20 20:51:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:04,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:04,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:04,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 20:51:04,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:04,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:51:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 20:51:05,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 20:51:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:05,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576779928] [2022-03-20 20:51:05,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283980596] [2022-03-20 20:51:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283980596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:05,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:05,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 20:51:05,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229933442] [2022-03-20 20:51:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229933442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:05,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:51:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423885842] [2022-03-20 20:51:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:05,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:51:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:51:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:51:05,294 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:51:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:05,404 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-20 20:51:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:51:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 20:51:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:05,407 INFO L225 Difference]: With dead ends: 52 [2022-03-20 20:51:05,407 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 20:51:05,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:51:05,409 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:05,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 20:51:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 20:51:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:51:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 20:51:05,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 20:51:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:05,430 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 20:51:05,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:51:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 20:51:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 20:51:05,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:05,433 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:05,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:05,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:05,648 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-20 20:51:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:05,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [428636402] [2022-03-20 20:51:05,649 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-20 20:51:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:05,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48896384] [2022-03-20 20:51:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:05,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:05,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584273368] [2022-03-20 20:51:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:05,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:05,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:05,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 20:51:05,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:51:05,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:05,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:51:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:51:05,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48896384] [2022-03-20 20:51:05,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584273368] [2022-03-20 20:51:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584273368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:05,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:05,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:05,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [428636402] [2022-03-20 20:51:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [428636402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:05,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:05,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:05,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361814793] [2022-03-20 20:51:05,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:05,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:05,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:05,811 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 20:51:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:05,846 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-20 20:51:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-20 20:51:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:05,847 INFO L225 Difference]: With dead ends: 50 [2022-03-20 20:51:05,848 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 20:51:05,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:51:05,849 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:05,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:51:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 20:51:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-20 20:51:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 20:51:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-20 20:51:05,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-20 20:51:05,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:05,856 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-20 20:51:05,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 20:51:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-20 20:51:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 20:51:05,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:05,858 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:05,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:06,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 20:51:06,076 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-20 20:51:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989423879] [2022-03-20 20:51:06,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-20 20:51:06,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414961108] [2022-03-20 20:51:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:06,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:06,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748017356] [2022-03-20 20:51:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:06,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:06,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 20:51:06,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 20:51:06,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:06,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414961108] [2022-03-20 20:51:06,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:06,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748017356] [2022-03-20 20:51:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748017356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:06,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:06,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:06,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989423879] [2022-03-20 20:51:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989423879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:06,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634528803] [2022-03-20 20:51:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:06,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:06,316 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:51:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:06,346 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-20 20:51:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-20 20:51:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:06,349 INFO L225 Difference]: With dead ends: 58 [2022-03-20 20:51:06,349 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 20:51:06,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:51:06,350 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:06,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:51:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 20:51:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 20:51:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:51:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-20 20:51:06,371 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-20 20:51:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:06,372 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-20 20:51:06,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 20:51:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-20 20:51:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 20:51:06,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:06,373 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:06,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 20:51:06,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:06,573 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-20 20:51:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:06,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888272277] [2022-03-20 20:51:06,574 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-20 20:51:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:06,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67490639] [2022-03-20 20:51:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:06,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:06,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916896667] [2022-03-20 20:51:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:06,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:06,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:06,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 20:51:06,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 20:51:06,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:06,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67490639] [2022-03-20 20:51:06,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916896667] [2022-03-20 20:51:06,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916896667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:06,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:06,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:06,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888272277] [2022-03-20 20:51:06,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888272277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:06,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:06,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:06,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432836008] [2022-03-20 20:51:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:06,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:06,785 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:51:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:06,829 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-20 20:51:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-20 20:51:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:06,831 INFO L225 Difference]: With dead ends: 62 [2022-03-20 20:51:06,831 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:51:06,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:51:06,834 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:06,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:51:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:51:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 20:51:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:51:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-20 20:51:06,845 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-20 20:51:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:06,846 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-20 20:51:06,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:51:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-20 20:51:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 20:51:06,846 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:06,846 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:06,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:07,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:07,064 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-20 20:51:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351981155] [2022-03-20 20:51:07,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-20 20:51:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815896242] [2022-03-20 20:51:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:07,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:07,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141491164] [2022-03-20 20:51:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:07,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:07,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 20:51:07,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:51:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 20:51:07,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:07,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:07,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815896242] [2022-03-20 20:51:07,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:07,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141491164] [2022-03-20 20:51:07,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141491164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:07,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:07,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 20:51:07,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351981155] [2022-03-20 20:51:07,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351981155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:07,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:07,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:51:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485834030] [2022-03-20 20:51:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:07,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:51:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:51:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:51:07,484 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 20:51:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:07,567 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-20 20:51:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:51:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 20:51:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:07,571 INFO L225 Difference]: With dead ends: 66 [2022-03-20 20:51:07,571 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 20:51:07,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:51:07,573 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:07,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 20:51:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 20:51:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 20:51:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-20 20:51:07,596 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-20 20:51:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:07,597 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-20 20:51:07,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 20:51:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-20 20:51:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 20:51:07,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:07,600 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:07,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:07,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:07,808 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-20 20:51:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695365872] [2022-03-20 20:51:07,809 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-20 20:51:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:07,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974599795] [2022-03-20 20:51:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:07,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609823113] [2022-03-20 20:51:07,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:07,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:07,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:51:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:51:07,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 20:51:07,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-20 20:51:08,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974599795] [2022-03-20 20:51:08,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609823113] [2022-03-20 20:51:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609823113] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:08,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:08,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 20:51:08,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695365872] [2022-03-20 20:51:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695365872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:08,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:08,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526563330] [2022-03-20 20:51:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:08,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:51:08,109 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 20:51:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:08,146 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 20:51:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-20 20:51:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:08,147 INFO L225 Difference]: With dead ends: 69 [2022-03-20 20:51:08,147 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 20:51:08,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:51:08,148 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:08,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:51:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 20:51:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-20 20:51:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:51:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 20:51:08,157 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-20 20:51:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:08,157 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 20:51:08,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 20:51:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 20:51:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:51:08,158 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:08,158 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:08,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:08,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:08,378 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-20 20:51:08,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:08,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604452370] [2022-03-20 20:51:08,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-20 20:51:08,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072633365] [2022-03-20 20:51:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:08,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843155245] [2022-03-20 20:51:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:08,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:08,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:51:08,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 20:51:08,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 20:51:08,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072633365] [2022-03-20 20:51:08,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843155245] [2022-03-20 20:51:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843155245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:08,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:08,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:51:08,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604452370] [2022-03-20 20:51:08,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604452370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:08,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:08,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:51:08,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112873244] [2022-03-20 20:51:08,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:08,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:51:08,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:08,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:51:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:51:08,680 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:51:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:08,793 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-20 20:51:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:51:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-20 20:51:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:08,796 INFO L225 Difference]: With dead ends: 106 [2022-03-20 20:51:08,796 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 20:51:08,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:51:08,797 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:08,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 20:51:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 20:51:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 20:51:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 20:51:08,817 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 20:51:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:08,817 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 20:51:08,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:51:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 20:51:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 20:51:08,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:08,819 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:08,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:09,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:09,033 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-20 20:51:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1717973947] [2022-03-20 20:51:09,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-20 20:51:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026630631] [2022-03-20 20:51:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:09,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068637814] [2022-03-20 20:51:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:09,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:09,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:09,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:51:09,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 20:51:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:51:09,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:51:09,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:09,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026630631] [2022-03-20 20:51:09,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068637814] [2022-03-20 20:51:09,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068637814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:09,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:09,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 20:51:09,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1717973947] [2022-03-20 20:51:09,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1717973947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:09,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:09,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:51:09,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855345972] [2022-03-20 20:51:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:09,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:51:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:51:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:51:09,442 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:51:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:09,643 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-20 20:51:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:51:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-20 20:51:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:09,644 INFO L225 Difference]: With dead ends: 124 [2022-03-20 20:51:09,644 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 20:51:09,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:51:09,645 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:09,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 20:51:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-20 20:51:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:51:09,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-20 20:51:09,660 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-20 20:51:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:09,660 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-20 20:51:09,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 20:51:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-20 20:51:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 20:51:09,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:09,661 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:09,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:09,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 20:51:09,875 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-20 20:51:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541019515] [2022-03-20 20:51:09,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-20 20:51:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758588247] [2022-03-20 20:51:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:09,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921573046] [2022-03-20 20:51:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:51:09,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:09,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:09,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:51:09,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:51:09,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:09,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 20:51:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:51:10,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 20:51:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758588247] [2022-03-20 20:51:11,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:11,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921573046] [2022-03-20 20:51:11,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921573046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:11,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:11,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-03-20 20:51:11,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:11,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541019515] [2022-03-20 20:51:11,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541019515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:11,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:11,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:51:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929842869] [2022-03-20 20:51:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:11,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:51:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:51:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:51:11,105 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 20:51:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:11,663 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-20 20:51:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:51:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-03-20 20:51:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:11,664 INFO L225 Difference]: With dead ends: 134 [2022-03-20 20:51:11,664 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 20:51:11,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:51:11,665 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:11,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 287 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:51:11,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 20:51:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-20 20:51:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:51:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-20 20:51:11,680 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-03-20 20:51:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:11,680 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-20 20:51:11,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-03-20 20:51:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-20 20:51:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:51:11,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:11,681 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:11,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:11,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:51:11,916 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-20 20:51:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007543552] [2022-03-20 20:51:11,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-20 20:51:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976667219] [2022-03-20 20:51:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:11,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:11,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244384727] [2022-03-20 20:51:11,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:51:11,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:11,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:11,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 20:51:11,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:51:11,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 20:51:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 20:51:12,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:12,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976667219] [2022-03-20 20:51:12,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:12,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244384727] [2022-03-20 20:51:12,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244384727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:12,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:12,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 20:51:12,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007543552] [2022-03-20 20:51:12,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007543552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:12,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:12,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:51:12,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053528048] [2022-03-20 20:51:12,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:12,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:51:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:12,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:51:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:51:12,584 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 20:51:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:12,870 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-03-20 20:51:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:51:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-20 20:51:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:12,875 INFO L225 Difference]: With dead ends: 138 [2022-03-20 20:51:12,875 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 20:51:12,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:51:12,876 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:12,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 238 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:51:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 20:51:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-03-20 20:51:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 76 states have internal predecessors, (87), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:51:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 178 transitions. [2022-03-20 20:51:12,897 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 178 transitions. Word has length 85 [2022-03-20 20:51:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:12,897 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 178 transitions. [2022-03-20 20:51:12,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 20:51:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 178 transitions. [2022-03-20 20:51:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:51:12,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:12,899 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:12,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:13,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 20:51:13,108 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-20 20:51:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [955142459] [2022-03-20 20:51:13,109 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-20 20:51:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:13,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386681004] [2022-03-20 20:51:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:13,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305064820] [2022-03-20 20:51:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:13,118 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:13,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 20:51:13,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:13,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 20:51:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:51:13,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 20:51:13,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386681004] [2022-03-20 20:51:13,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305064820] [2022-03-20 20:51:13,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305064820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:13,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:13,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:51:13,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [955142459] [2022-03-20 20:51:13,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [955142459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:13,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:13,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:51:13,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847520947] [2022-03-20 20:51:13,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:13,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:51:13,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:51:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:51:13,913 INFO L87 Difference]: Start difference. First operand 134 states and 178 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:51:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:14,120 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-03-20 20:51:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:51:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-20 20:51:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:14,131 INFO L225 Difference]: With dead ends: 161 [2022-03-20 20:51:14,131 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 20:51:14,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:51:14,131 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:14,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:51:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 20:51:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-03-20 20:51:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:51:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-20 20:51:14,148 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 91 [2022-03-20 20:51:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:14,149 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-20 20:51:14,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:51:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-20 20:51:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 20:51:14,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:14,150 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:14,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:14,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 20:51:14,368 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-20 20:51:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431852514] [2022-03-20 20:51:14,369 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-20 20:51:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:14,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290256618] [2022-03-20 20:51:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:14,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779244203] [2022-03-20 20:51:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:14,384 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:14,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 20:51:14,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:51:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-20 20:51:14,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290256618] [2022-03-20 20:51:14,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779244203] [2022-03-20 20:51:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779244203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:14,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:14,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:14,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431852514] [2022-03-20 20:51:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431852514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:14,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:14,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813339675] [2022-03-20 20:51:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:14,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:14,555 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 20:51:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:14,614 INFO L93 Difference]: Finished difference Result 205 states and 283 transitions. [2022-03-20 20:51:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:51:14,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-20 20:51:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:14,616 INFO L225 Difference]: With dead ends: 205 [2022-03-20 20:51:14,616 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 20:51:14,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:51:14,617 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:14,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:51:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 20:51:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2022-03-20 20:51:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 81 states have (on average 1.123456790123457) internal successors, (91), 83 states have internal predecessors, (91), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:51:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-03-20 20:51:14,640 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 100 [2022-03-20 20:51:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:14,642 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-03-20 20:51:14,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 20:51:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-03-20 20:51:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 20:51:14,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:14,646 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:14,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:14,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 20:51:14,847 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-20 20:51:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431701866] [2022-03-20 20:51:14,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-20 20:51:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:14,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988075677] [2022-03-20 20:51:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:14,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:14,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495187959] [2022-03-20 20:51:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:14,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:14,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 20:51:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 20:51:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 20:51:15,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:20,392 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse3 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse2 (* .cse1 c_main_~x~0))) (let ((.cse4 (+ .cse0 .cse2)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0))) (or (= (+ .cse0 (* c_main_~xy~0 .cse1) .cse2 (* c_main_~yy~0 .cse3)) (+ .cse0 (* .cse4 c_main_~y~0) .cse2)) (not (= c_main_~c~0 .cse4)) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))))))) is different from true [2022-03-20 20:51:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 196 trivial. 4 not checked. [2022-03-20 20:51:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988075677] [2022-03-20 20:51:33,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495187959] [2022-03-20 20:51:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495187959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:33,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 20:51:33,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431701866] [2022-03-20 20:51:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431701866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:33,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:33,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:51:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227804830] [2022-03-20 20:51:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:33,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:51:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:51:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=440, Unknown=1, NotChecked=44, Total=600 [2022-03-20 20:51:33,579 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:51:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:34,522 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2022-03-20 20:51:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:51:34,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-20 20:51:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:34,524 INFO L225 Difference]: With dead ends: 158 [2022-03-20 20:51:34,524 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 20:51:34,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=147, Invalid=612, Unknown=1, NotChecked=52, Total=812 [2022-03-20 20:51:34,525 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:34,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 341 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:51:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 20:51:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-20 20:51:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:51:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-03-20 20:51:34,542 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 107 [2022-03-20 20:51:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:34,542 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-03-20 20:51:34,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:51:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-03-20 20:51:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 20:51:34,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:34,543 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:51:34,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 20:51:34,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 20:51:34,747 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-20 20:51:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:34,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109122848] [2022-03-20 20:51:34,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-20 20:51:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:34,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479495425] [2022-03-20 20:51:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:34,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:34,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:34,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552436286] [2022-03-20 20:51:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:51:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:34,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:51:34,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 20:51:34,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:51:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:34,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 20:51:34,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:35,273 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:51:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 20:51:36,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:37,431 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:51:37,436 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:51:39,863 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:52:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 20:52:07,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479495425] [2022-03-20 20:52:07,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552436286] [2022-03-20 20:52:07,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552436286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:07,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:07,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-20 20:52:07,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109122848] [2022-03-20 20:52:07,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109122848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:07,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:07,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:52:07,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959418049] [2022-03-20 20:52:07,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:07,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:52:07,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:07,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:52:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=625, Unknown=5, NotChecked=0, Total=756 [2022-03-20 20:52:07,720 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 20:52:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:09,591 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-03-20 20:52:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:52:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2022-03-20 20:52:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:09,594 INFO L225 Difference]: With dead ends: 188 [2022-03-20 20:52:09,594 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 20:52:09,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=186, Invalid=931, Unknown=5, NotChecked=0, Total=1122 [2022-03-20 20:52:09,595 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:09,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 483 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:52:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 20:52:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-20 20:52:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 99 states have (on average 1.121212121212121) internal successors, (111), 101 states have internal predecessors, (111), 67 states have call successors, (67), 18 states have call predecessors, (67), 17 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 20:52:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2022-03-20 20:52:09,621 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 113 [2022-03-20 20:52:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:09,621 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2022-03-20 20:52:09,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 20:52:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2022-03-20 20:52:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 20:52:09,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:09,622 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:09,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:09,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:09,831 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-20 20:52:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31606947] [2022-03-20 20:52:09,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-20 20:52:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189774092] [2022-03-20 20:52:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:09,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:09,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066798975] [2022-03-20 20:52:09,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:52:09,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:09,840 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:09,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 20:52:09,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:52:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:52:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 20:52:10,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 20:52:10,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189774092] [2022-03-20 20:52:10,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066798975] [2022-03-20 20:52:10,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066798975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:10,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:10,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 20:52:10,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31606947] [2022-03-20 20:52:10,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31606947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:10,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:10,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:52:10,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931564331] [2022-03-20 20:52:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:10,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:52:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:52:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:52:10,186 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-20 20:52:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:10,374 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2022-03-20 20:52:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:52:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-20 20:52:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:10,376 INFO L225 Difference]: With dead ends: 244 [2022-03-20 20:52:10,376 INFO L226 Difference]: Without dead ends: 236 [2022-03-20 20:52:10,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-20 20:52:10,377 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:10,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:52:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-20 20:52:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2022-03-20 20:52:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 20:52:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 300 transitions. [2022-03-20 20:52:10,426 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 300 transitions. Word has length 116 [2022-03-20 20:52:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:10,426 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 300 transitions. [2022-03-20 20:52:10,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-20 20:52:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 300 transitions. [2022-03-20 20:52:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 20:52:10,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:10,427 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:10,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:10,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 20:52:10,631 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-20 20:52:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482050840] [2022-03-20 20:52:10,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-20 20:52:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732011366] [2022-03-20 20:52:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:10,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919737854] [2022-03-20 20:52:10,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:10,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:10,640 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:10,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 20:52:10,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:10,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:10,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:52:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-20 20:52:10,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-20 20:52:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732011366] [2022-03-20 20:52:11,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919737854] [2022-03-20 20:52:11,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919737854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:11,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:11,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:52:11,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:11,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482050840] [2022-03-20 20:52:11,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482050840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:11,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:11,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:52:11,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187486385] [2022-03-20 20:52:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:11,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:52:11,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:11,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:52:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:52:11,017 INFO L87 Difference]: Start difference. First operand 217 states and 300 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 20:52:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:11,187 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-03-20 20:52:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:52:11,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-20 20:52:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:11,189 INFO L225 Difference]: With dead ends: 235 [2022-03-20 20:52:11,189 INFO L226 Difference]: Without dead ends: 232 [2022-03-20 20:52:11,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:52:11,190 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:11,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 209 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:52:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-20 20:52:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-03-20 20:52:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:52:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-03-20 20:52:11,219 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-03-20 20:52:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:11,219 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-03-20 20:52:11,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 20:52:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-03-20 20:52:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 20:52:11,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:11,220 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:11,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:11,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 20:52:11,435 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-20 20:52:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1516314939] [2022-03-20 20:52:11,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-20 20:52:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105170860] [2022-03-20 20:52:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:11,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324034576] [2022-03-20 20:52:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:52:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:11,444 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:11,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 20:52:11,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:52:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:11,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 20:52:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 20:52:12,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 20:52:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105170860] [2022-03-20 20:52:13,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324034576] [2022-03-20 20:52:13,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324034576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:13,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:13,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-20 20:52:13,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1516314939] [2022-03-20 20:52:13,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1516314939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:13,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:52:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863154952] [2022-03-20 20:52:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:13,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:52:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:52:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:52:13,508 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:52:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:13,986 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-03-20 20:52:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:52:13,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-03-20 20:52:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:13,988 INFO L225 Difference]: With dead ends: 269 [2022-03-20 20:52:13,989 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 20:52:13,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:52:13,989 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:13,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 562 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:52:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 20:52:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-03-20 20:52:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-20 20:52:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-20 20:52:14,024 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-03-20 20:52:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:14,024 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-20 20:52:14,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:52:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-20 20:52:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 20:52:14,025 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:14,025 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:14,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:14,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 20:52:14,239 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-20 20:52:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612032881] [2022-03-20 20:52:14,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-20 20:52:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319581072] [2022-03-20 20:52:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:14,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:14,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317075230] [2022-03-20 20:52:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:52:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:14,248 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:14,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 20:52:14,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:52:14,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 20:52:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-20 20:52:14,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:17,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319581072] [2022-03-20 20:52:17,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317075230] [2022-03-20 20:52:17,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317075230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:52:17,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:52:17,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 20:52:17,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612032881] [2022-03-20 20:52:17,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612032881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:17,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:17,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:52:17,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055156577] [2022-03-20 20:52:17,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:17,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:52:17,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:17,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:52:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-03-20 20:52:17,350 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-20 20:52:17,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:17,633 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-03-20 20:52:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:52:17,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2022-03-20 20:52:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:17,635 INFO L225 Difference]: With dead ends: 281 [2022-03-20 20:52:17,635 INFO L226 Difference]: Without dead ends: 279 [2022-03-20 20:52:17,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2022-03-20 20:52:17,636 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:17,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:52:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-20 20:52:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-03-20 20:52:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.118881118881119) internal successors, (160), 145 states have internal predecessors, (160), 88 states have call successors, (88), 27 states have call predecessors, (88), 26 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-20 20:52:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2022-03-20 20:52:17,681 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 129 [2022-03-20 20:52:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:17,681 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2022-03-20 20:52:17,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-20 20:52:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2022-03-20 20:52:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 20:52:17,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:17,682 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:17,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:17,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:17,892 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-20 20:52:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:17,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88297961] [2022-03-20 20:52:17,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-20 20:52:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152540721] [2022-03-20 20:52:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:17,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:17,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619315284] [2022-03-20 20:52:17,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:17,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:17,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:17,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 20:52:17,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:17,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 20:52:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:28,947 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:52:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 133 proven. 85 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-20 20:52:28,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:29,058 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:52:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152540721] [2022-03-20 20:52:29,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619315284] [2022-03-20 20:52:29,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619315284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:52:29,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:52:29,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 20:52:29,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:29,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88297961] [2022-03-20 20:52:29,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88297961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:29,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:29,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:52:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471426825] [2022-03-20 20:52:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:29,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:52:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:52:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:52:29,239 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:52:31,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:52:45,617 WARN L232 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:52:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:45,770 INFO L93 Difference]: Finished difference Result 296 states and 384 transitions. [2022-03-20 20:52:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:52:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 132 [2022-03-20 20:52:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:45,776 INFO L225 Difference]: With dead ends: 296 [2022-03-20 20:52:45,776 INFO L226 Difference]: Without dead ends: 294 [2022-03-20 20:52:45,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:52:45,778 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:45,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 233 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 20:52:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-20 20:52:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-03-20 20:52:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 161 states have (on average 1.124223602484472) internal successors, (181), 163 states have internal predecessors, (181), 100 states have call successors, (100), 30 states have call predecessors, (100), 29 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 20:52:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 379 transitions. [2022-03-20 20:52:45,823 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 379 transitions. Word has length 132 [2022-03-20 20:52:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:45,823 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 379 transitions. [2022-03-20 20:52:45,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:52:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 379 transitions. [2022-03-20 20:52:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 20:52:45,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:45,824 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:45,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:46,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:46,043 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:46,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-20 20:52:46,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:46,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234379083] [2022-03-20 20:52:46,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-20 20:52:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731591966] [2022-03-20 20:52:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:46,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189976625] [2022-03-20 20:52:46,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:52:46,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:46,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:46,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 20:52:46,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:52:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 20:52:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 20:52:46,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 20:52:49,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731591966] [2022-03-20 20:52:49,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189976625] [2022-03-20 20:52:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189976625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:49,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:49,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-20 20:52:49,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234379083] [2022-03-20 20:52:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234379083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:49,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:49,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:52:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995925596] [2022-03-20 20:52:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:49,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:52:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:52:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:52:49,468 INFO L87 Difference]: Start difference. First operand 291 states and 379 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 20:52:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:50,315 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-03-20 20:52:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:52:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-20 20:52:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:50,317 INFO L225 Difference]: With dead ends: 339 [2022-03-20 20:52:50,317 INFO L226 Difference]: Without dead ends: 332 [2022-03-20 20:52:50,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-20 20:52:50,318 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:50,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 503 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:52:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-20 20:52:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 301. [2022-03-20 20:52:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 168 states have internal predecessors, (187), 104 states have call successors, (104), 31 states have call predecessors, (104), 30 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 20:52:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 393 transitions. [2022-03-20 20:52:50,360 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 393 transitions. Word has length 135 [2022-03-20 20:52:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:50,360 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 393 transitions. [2022-03-20 20:52:50,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-20 20:52:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 393 transitions. [2022-03-20 20:52:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 20:52:50,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:50,367 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:52:50,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:50,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 20:52:50,583 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-20 20:52:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:50,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266396430] [2022-03-20 20:52:50,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-20 20:52:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:50,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99178345] [2022-03-20 20:52:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:50,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:50,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657503286] [2022-03-20 20:52:50,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:50,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:52:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 20:52:50,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:50,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 20:52:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:52,665 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:52:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 149 proven. 58 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-20 20:52:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-20 20:52:59,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99178345] [2022-03-20 20:52:59,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657503286] [2022-03-20 20:52:59,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657503286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:59,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:59,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 32 [2022-03-20 20:52:59,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266396430] [2022-03-20 20:52:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266396430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:59,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:59,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 20:52:59,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17229336] [2022-03-20 20:52:59,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:59,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 20:52:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 20:52:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-03-20 20:52:59,583 INFO L87 Difference]: Start difference. First operand 301 states and 393 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 20:53:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:01,679 INFO L93 Difference]: Finished difference Result 351 states and 459 transitions. [2022-03-20 20:53:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:53:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-20 20:53:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:01,682 INFO L225 Difference]: With dead ends: 351 [2022-03-20 20:53:01,682 INFO L226 Difference]: Without dead ends: 348 [2022-03-20 20:53:01,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 20:53:01,683 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:01,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 510 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 20:53:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-20 20:53:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 315. [2022-03-20 20:53:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 176 states have internal predecessors, (196), 108 states have call successors, (108), 33 states have call predecessors, (108), 32 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 20:53:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-03-20 20:53:01,731 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 138 [2022-03-20 20:53:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:01,732 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-03-20 20:53:01,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 20:53:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-03-20 20:53:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 20:53:01,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:01,733 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:01,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 20:53:01,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 20:53:01,947 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-20 20:53:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:01,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662528147] [2022-03-20 20:53:01,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-20 20:53:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:01,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003540738] [2022-03-20 20:53:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:01,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:01,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328480741] [2022-03-20 20:53:01,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:53:01,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:01,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:01,959 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:53:01,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 20:53:02,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:53:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 20:53:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-20 20:53:02,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-20 20:53:03,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003540738] [2022-03-20 20:53:03,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328480741] [2022-03-20 20:53:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328480741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:53:03,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:53:03,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-20 20:53:03,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662528147] [2022-03-20 20:53:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662528147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:03,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:03,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:53:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803869350] [2022-03-20 20:53:03,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:03,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:53:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:53:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:53:03,038 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:53:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:53:03,705 INFO L93 Difference]: Finished difference Result 383 states and 501 transitions. [2022-03-20 20:53:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:53:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-20 20:53:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:53:03,707 INFO L225 Difference]: With dead ends: 383 [2022-03-20 20:53:03,707 INFO L226 Difference]: Without dead ends: 381 [2022-03-20 20:53:03,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:53:03,708 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:53:03,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 438 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 20:53:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-20 20:53:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-20 20:53:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 209 states have internal predecessors, (233), 132 states have call successors, (132), 38 states have call predecessors, (132), 37 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2022-03-20 20:53:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 495 transitions. [2022-03-20 20:53:03,768 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 495 transitions. Word has length 149 [2022-03-20 20:53:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:53:03,769 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 495 transitions. [2022-03-20 20:53:03,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 20:53:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 495 transitions. [2022-03-20 20:53:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 20:53:03,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:53:03,770 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:53:03,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 20:53:03,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:03,988 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:53:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:53:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 13 times [2022-03-20 20:53:03,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1488973808] [2022-03-20 20:53:03,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:53:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 14 times [2022-03-20 20:53:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:53:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972931476] [2022-03-20 20:53:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:53:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:53:03,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:53:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210144777] [2022-03-20 20:53:03,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:53:03,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:53:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:53:03,999 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:53:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 20:53:04,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:53:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:53:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 20:53:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:53:05,601 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:53:05,603 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:53:05,604 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:53:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 192 proven. 173 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 20:53:12,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:53:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:53:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972931476] [2022-03-20 20:53:17,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:53:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210144777] [2022-03-20 20:53:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210144777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:53:17,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:53:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 20:53:17,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:53:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1488973808] [2022-03-20 20:53:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1488973808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:53:17,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:53:17,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:53:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931835866] [2022-03-20 20:53:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:53:17,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:53:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:53:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:53:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=395, Unknown=1, NotChecked=0, Total=506 [2022-03-20 20:53:17,292 INFO L87 Difference]: Start difference. First operand 377 states and 495 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-20 20:53:20,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:53:22,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:53:24,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:53:26,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:53:28,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 20:53:53,162 WARN L232 SmtUtils]: Spent 24.24s on a formula simplification. DAG size of input: 65 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:54:15,151 WARN L232 SmtUtils]: Spent 21.82s on a formula simplification. DAG size of input: 69 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:54:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:15,944 INFO L93 Difference]: Finished difference Result 415 states and 544 transitions. [2022-03-20 20:54:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:54:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2022-03-20 20:54:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:15,947 INFO L225 Difference]: With dead ends: 415 [2022-03-20 20:54:15,947 INFO L226 Difference]: Without dead ends: 413 [2022-03-20 20:54:15,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=160, Invalid=651, Unknown=1, NotChecked=0, Total=812 [2022-03-20 20:54:15,948 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 31 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 50 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:15,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 786 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 881 Invalid, 5 Unknown, 0 Unchecked, 12.2s Time] [2022-03-20 20:54:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-20 20:54:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2022-03-20 20:54:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 227 states have internal predecessors, (253), 144 states have call successors, (144), 41 states have call predecessors, (144), 40 states have return successors, (142), 141 states have call predecessors, (142), 142 states have call successors, (142) [2022-03-20 20:54:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2022-03-20 20:54:16,019 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 154 [2022-03-20 20:54:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:16,019 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2022-03-20 20:54:16,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-20 20:54:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2022-03-20 20:54:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 20:54:16,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:16,020 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:54:16,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 20:54:16,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:16,230 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-03-20 20:54:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143229669] [2022-03-20 20:54:16,231 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-03-20 20:54:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:16,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213067842] [2022-03-20 20:54:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:16,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393647197] [2022-03-20 20:54:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:54:16,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:16,238 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:54:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 20:54:16,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:54:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 20:54:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-03-20 20:54:17,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:17,720 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:46,509 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:56:30,871 WARN L232 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 20:56:54,300 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0))))) is different from true [2022-03-20 20:57:12,340 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 20:57:22,359 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0)))) is different from true [2022-03-20 20:57:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 122 proven. 75 refuted. 12 times theorem prover too weak. 708 trivial. 5 not checked. [2022-03-20 20:57:23,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:57:23,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213067842] [2022-03-20 20:57:23,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:57:23,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393647197] [2022-03-20 20:57:23,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393647197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:57:23,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:57:23,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 26 [2022-03-20 20:57:23,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:57:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143229669] [2022-03-20 20:57:23,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143229669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:57:23,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:57:23,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:57:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234759859] [2022-03-20 20:57:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:57:23,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:57:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:57:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=419, Unknown=3, NotChecked=132, Total=650 [2022-03-20 20:57:23,290 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 20:57:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:57:23,754 INFO L93 Difference]: Finished difference Result 422 states and 549 transitions. [2022-03-20 20:57:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:57:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 157 [2022-03-20 20:57:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:57:23,757 INFO L225 Difference]: With dead ends: 422 [2022-03-20 20:57:23,757 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 20:57:23,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=149, Invalid=616, Unknown=3, NotChecked=162, Total=930 [2022-03-20 20:57:23,757 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:57:23,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 371 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:57:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 20:57:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 383. [2022-03-20 20:57:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 212 states have internal predecessors, (236), 133 states have call successors, (133), 39 states have call predecessors, (133), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:57:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 500 transitions. [2022-03-20 20:57:23,820 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 500 transitions. Word has length 157 [2022-03-20 20:57:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:57:23,821 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 500 transitions. [2022-03-20 20:57:23,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 20:57:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 500 transitions. [2022-03-20 20:57:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 20:57:23,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:57:23,822 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:57:23,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 20:57:24,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 20:57:24,031 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:57:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:57:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-03-20 20:57:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:24,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026533920] [2022-03-20 20:57:24,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:57:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-03-20 20:57:24,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:57:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118913194] [2022-03-20 20:57:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:57:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:57:24,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:57:24,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365960056] [2022-03-20 20:57:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:57:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:57:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:57:24,039 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:57:24,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 20:57:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:57:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:57:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 20:57:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:57:24,772 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:24,774 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-03-20 20:57:25,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:57:28,878 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:28,879 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:57:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118913194] [2022-03-20 20:57:30,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:57:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365960056] [2022-03-20 20:57:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365960056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:57:30,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:57:30,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 20:57:30,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:57:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026533920] [2022-03-20 20:57:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026533920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:57:30,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:57:30,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:57:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796357779] [2022-03-20 20:57:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:57:30,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:57:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:57:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:57:30,914 INFO L87 Difference]: Start difference. First operand 383 states and 500 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 20:57:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:57:34,092 INFO L93 Difference]: Finished difference Result 427 states and 561 transitions. [2022-03-20 20:57:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:57:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-20 20:57:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:57:34,094 INFO L225 Difference]: With dead ends: 427 [2022-03-20 20:57:34,094 INFO L226 Difference]: Without dead ends: 424 [2022-03-20 20:57:34,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:57:34,095 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 20:57:34,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 614 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 20:57:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-03-20 20:57:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 422. [2022-03-20 20:57:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 231 states have (on average 1.121212121212121) internal successors, (259), 232 states have internal predecessors, (259), 149 states have call successors, (149), 42 states have call predecessors, (149), 41 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-20 20:57:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 555 transitions. [2022-03-20 20:57:34,169 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 555 transitions. Word has length 160 [2022-03-20 20:57:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:57:34,169 INFO L478 AbstractCegarLoop]: Abstraction has 422 states and 555 transitions. [2022-03-20 20:57:34,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 20:57:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 555 transitions. [2022-03-20 20:57:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 20:57:34,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:57:34,170 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:57:34,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 20:57:34,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 20:57:34,383 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:57:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:57:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-03-20 20:57:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882215459] [2022-03-20 20:57:34,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:57:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-03-20 20:57:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:57:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442304470] [2022-03-20 20:57:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:57:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:57:34,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:57:34,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000937124] [2022-03-20 20:57:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:57:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:57:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:57:34,391 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:57:34,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 20:57:34,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:57:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:57:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 20:57:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:57:35,148 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:35,296 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 177 proven. 122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-03-20 20:57:37,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:57:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 202 proven. 12 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-03-20 20:57:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:57:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442304470] [2022-03-20 20:57:38,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:57:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000937124] [2022-03-20 20:57:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000937124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:57:38,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:57:38,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-20 20:57:38,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:57:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882215459] [2022-03-20 20:57:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882215459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:57:38,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:57:38,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:57:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867097690] [2022-03-20 20:57:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:57:38,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:57:38,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:57:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:57:38,480 INFO L87 Difference]: Start difference. First operand 422 states and 555 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 20:57:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:57:39,820 INFO L93 Difference]: Finished difference Result 471 states and 620 transitions. [2022-03-20 20:57:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:57:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-20 20:57:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:57:39,823 INFO L225 Difference]: With dead ends: 471 [2022-03-20 20:57:39,823 INFO L226 Difference]: Without dead ends: 468 [2022-03-20 20:57:39,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:57:39,823 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 38 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:57:39,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 696 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:57:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-20 20:57:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2022-03-20 20:57:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 254 states have (on average 1.1220472440944882) internal successors, (285), 255 states have internal predecessors, (285), 165 states have call successors, (165), 46 states have call predecessors, (165), 45 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 20:57:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 613 transitions. [2022-03-20 20:57:39,901 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 613 transitions. Word has length 160 [2022-03-20 20:57:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:57:39,902 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 613 transitions. [2022-03-20 20:57:39,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 20:57:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 613 transitions. [2022-03-20 20:57:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-20 20:57:39,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:57:39,903 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:57:39,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 20:57:40,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 20:57:40,119 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:57:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:57:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 15 times [2022-03-20 20:57:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:40,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793418852] [2022-03-20 20:57:40,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:57:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 16 times [2022-03-20 20:57:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:57:40,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998597332] [2022-03-20 20:57:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:57:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:57:40,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:57:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101338468] [2022-03-20 20:57:40,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:57:40,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:57:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:57:40,131 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:57:40,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 20:57:40,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:57:40,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:57:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 20:57:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:57:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 162 proven. 112 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2022-03-20 20:57:41,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:57:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-03-20 20:57:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:57:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998597332] [2022-03-20 20:57:44,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:57:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101338468] [2022-03-20 20:57:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101338468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:57:44,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:57:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-20 20:57:44,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:57:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793418852] [2022-03-20 20:57:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793418852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:57:44,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:57:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 20:57:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848713786] [2022-03-20 20:57:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:57:44,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 20:57:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 20:57:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 20:57:44,175 INFO L87 Difference]: Start difference. First operand 465 states and 613 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-03-20 20:57:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:57:45,457 INFO L93 Difference]: Finished difference Result 511 states and 668 transitions. [2022-03-20 20:57:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:57:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 174 [2022-03-20 20:57:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:57:45,459 INFO L225 Difference]: With dead ends: 511 [2022-03-20 20:57:45,459 INFO L226 Difference]: Without dead ends: 509 [2022-03-20 20:57:45,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 20:57:45,460 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:57:45,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 494 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:57:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-20 20:57:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 488. [2022-03-20 20:57:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 270 states have (on average 1.114814814814815) internal successors, (301), 272 states have internal predecessors, (301), 168 states have call successors, (168), 50 states have call predecessors, (168), 49 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 20:57:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 635 transitions. [2022-03-20 20:57:45,545 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 635 transitions. Word has length 174 [2022-03-20 20:57:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:57:45,545 INFO L478 AbstractCegarLoop]: Abstraction has 488 states and 635 transitions. [2022-03-20 20:57:45,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-03-20 20:57:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 635 transitions. [2022-03-20 20:57:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 20:57:45,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:57:45,546 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:57:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 20:57:45,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 20:57:45,759 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:57:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:57:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 17 times [2022-03-20 20:57:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:57:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [987072613] [2022-03-20 20:57:45,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:57:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 18 times [2022-03-20 20:57:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:57:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664542648] [2022-03-20 20:57:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:57:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:57:45,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:57:45,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393454359] [2022-03-20 20:57:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:57:45,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:57:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:57:45,768 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:57:45,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 20:57:46,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:57:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:57:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 20:57:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:57:48,101 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:57:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 176 proven. 91 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2022-03-20 20:57:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664542648] [2022-03-20 20:58:06,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393454359] [2022-03-20 20:58:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393454359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:06,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:06,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 20:58:06,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [987072613] [2022-03-20 20:58:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [987072613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:06,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:06,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 20:58:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738050910] [2022-03-20 20:58:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:06,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 20:58:06,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 20:58:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=560, Unknown=3, NotChecked=0, Total=702 [2022-03-20 20:58:06,833 INFO L87 Difference]: Start difference. First operand 488 states and 635 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-20 20:58:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:08,175 INFO L93 Difference]: Finished difference Result 511 states and 660 transitions. [2022-03-20 20:58:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 20:58:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-03-20 20:58:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:08,178 INFO L225 Difference]: With dead ends: 511 [2022-03-20 20:58:08,178 INFO L226 Difference]: Without dead ends: 509 [2022-03-20 20:58:08,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=171, Invalid=756, Unknown=3, NotChecked=0, Total=930 [2022-03-20 20:58:08,179 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:08,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 485 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 356 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-03-20 20:58:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-20 20:58:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 508. [2022-03-20 20:58:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 283 states have (on average 1.1130742049469964) internal successors, (315), 286 states have internal predecessors, (315), 172 states have call successors, (172), 53 states have call predecessors, (172), 52 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2022-03-20 20:58:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 657 transitions. [2022-03-20 20:58:08,277 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 657 transitions. Word has length 176 [2022-03-20 20:58:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:08,278 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 657 transitions. [2022-03-20 20:58:08,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-20 20:58:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 657 transitions. [2022-03-20 20:58:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 20:58:08,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:08,279 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:08,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:08,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 20:58:08,485 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 19 times [2022-03-20 20:58:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739761968] [2022-03-20 20:58:08,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 20 times [2022-03-20 20:58:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774218209] [2022-03-20 20:58:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:08,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:08,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034694475] [2022-03-20 20:58:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:08,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:08,492 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:58:08,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 20:58:08,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-20 20:58:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:10,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 196 proven. 280 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2022-03-20 20:58:12,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:21,276 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:58:26,405 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~q~0 c_main_~x~0)) (.cse1 (* c_main_~s~0 c_main_~y~0))) (or (not (= c_main_~b~0 (+ .cse0 .cse1))) (let ((.cse19 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (let ((.cse2 (= c_main_~x~0 0)) (.cse16 (+ c_main_~c~0 (* (- 1) c_main_~r~0 c_main_~y~0) .cse19))) (and (or (not .cse2) (forall ((v_main_~q~0_102 Int)) (let ((.cse7 (* c_main_~s~0 c_main_~k~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse11 (* v_main_~q~0_102 c_main_~x~0)) (.cse8 (* c_main_~q~0 c_main_~x~0)) (.cse14 (* c_main_~s~0 c_main_~y~0))) (or (let ((.cse5 (+ c_main_~q~0 (* (- 1) v_main_~q~0_102))) (.cse6 (+ c_main_~s~0 .cse7 (* (- 1) c_main_~r~0)))) (let ((.cse3 (* .cse6 c_main_~y~0)) (.cse4 (* .cse5 c_main_~x~0))) (= (+ .cse3 .cse4 (* (+ .cse3 .cse4) c_main_~y~0)) (+ .cse3 .cse4 (* c_main_~xy~0 .cse5) (* c_main_~yy~0 .cse6))))) (not (let ((.cse15 (+ c_main_~r~0 (* (- 1) .cse7))) (.cse9 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse10 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse13 (* (- 1) c_main_~q~0 c_main_~x~0))) (= (+ (* c_main_~xy~0 v_main_~q~0_102) .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 (* c_main_~yy~0 .cse15)) (+ (* .cse15 c_main_~y~0) .cse11 (* (+ .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14) c_main_~y~0))))) (<= (+ (* 2 .cse12) (* 2 .cse11)) (+ .cse8 .cse14 (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (not (<= (+ v_main_~q~0_102 (* c_main_~q~0 c_main_~k~0)) c_main_~p~0))))) (not (= 0 .cse16))) (let ((.cse25 (div .cse16 c_main_~x~0))) (let ((.cse17 (* .cse25 c_main_~x~0)) (.cse18 (* c_main_~r~0 c_main_~y~0)) (.cse24 (* c_main_~s~0 c_main_~k~0))) (or (<= (+ (* .cse17 2) (* 2 .cse18)) (+ .cse0 .cse1 (* 2 .cse19))) (let ((.cse22 (+ c_main_~q~0 (* (- 1) .cse25))) (.cse23 (+ c_main_~s~0 .cse24 (* (- 1) c_main_~r~0)))) (let ((.cse20 (* .cse23 c_main_~y~0)) (.cse21 (* .cse22 c_main_~x~0))) (= (+ .cse20 .cse21 (* (+ .cse20 .cse21) c_main_~y~0)) (+ (* .cse22 c_main_~xy~0) .cse20 .cse21 (* c_main_~yy~0 .cse23))))) .cse2 (not (let ((.cse27 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse28 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse29 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse26 (+ c_main_~r~0 (* (- 1) .cse24)))) (= (+ (* .cse26 c_main_~y~0) .cse17 (* (+ .cse0 .cse17 .cse27 .cse28 .cse18 .cse29 .cse1) c_main_~y~0)) (+ (* .cse25 c_main_~xy~0) .cse0 .cse17 .cse27 .cse28 .cse18 .cse29 .cse1 (* c_main_~yy~0 .cse26))))) (not (= (mod .cse16 c_main_~x~0) 0)) (not (<= (+ .cse25 (* c_main_~q~0 c_main_~k~0)) c_main_~p~0)))))))))) is different from true [2022-03-20 20:58:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774218209] [2022-03-20 20:58:56,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034694475] [2022-03-20 20:58:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034694475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:58:56,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:58:56,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 20:58:56,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739761968] [2022-03-20 20:58:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739761968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:56,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:56,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 20:58:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928144094] [2022-03-20 20:58:56,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:56,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 20:58:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 20:58:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=834, Unknown=3, NotChecked=62, Total=1122 [2022-03-20 20:58:56,853 INFO L87 Difference]: Start difference. First operand 508 states and 657 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 20:59:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:00,514 INFO L93 Difference]: Finished difference Result 542 states and 684 transitions. [2022-03-20 20:59:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 20:59:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 179 [2022-03-20 20:59:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:00,517 INFO L225 Difference]: With dead ends: 542 [2022-03-20 20:59:00,517 INFO L226 Difference]: Without dead ends: 540 [2022-03-20 20:59:00,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=256, Invalid=1077, Unknown=3, NotChecked=70, Total=1406 [2022-03-20 20:59:00,518 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 39 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:00,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 712 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 644 Invalid, 0 Unknown, 149 Unchecked, 0.6s Time] [2022-03-20 20:59:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-03-20 20:59:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 536. [2022-03-20 20:59:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 304 states have (on average 1.105263157894737) internal successors, (336), 307 states have internal predecessors, (336), 172 states have call successors, (172), 60 states have call predecessors, (172), 59 states have return successors, (170), 168 states have call predecessors, (170), 170 states have call successors, (170) [2022-03-20 20:59:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 678 transitions. [2022-03-20 20:59:00,619 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 678 transitions. Word has length 179 [2022-03-20 20:59:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:00,619 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 678 transitions. [2022-03-20 20:59:00,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 20:59:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 678 transitions. [2022-03-20 20:59:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 20:59:00,620 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:00,620 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:00,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:00,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:00,827 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-03-20 20:59:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074135528] [2022-03-20 20:59:00,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-03-20 20:59:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:00,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885025911] [2022-03-20 20:59:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:00,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:00,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:00,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948394799] [2022-03-20 20:59:00,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:00,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:00,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:00,835 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:00,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 20:59:00,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:00,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:00,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 20:59:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-03-20 20:59:01,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:01,768 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:01,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885025911] [2022-03-20 20:59:01,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948394799] [2022-03-20 20:59:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948394799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:01,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 20:59:01,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074135528] [2022-03-20 20:59:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074135528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:01,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031849211] [2022-03-20 20:59:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:01,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:59:01,838 INFO L87 Difference]: Start difference. First operand 536 states and 678 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 20:59:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:02,287 INFO L93 Difference]: Finished difference Result 545 states and 686 transitions. [2022-03-20 20:59:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-03-20 20:59:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:02,289 INFO L225 Difference]: With dead ends: 545 [2022-03-20 20:59:02,289 INFO L226 Difference]: Without dead ends: 542 [2022-03-20 20:59:02,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:59:02,290 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:02,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 338 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-20 20:59:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 519. [2022-03-20 20:59:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 295 states have (on average 1.1016949152542372) internal successors, (325), 297 states have internal predecessors, (325), 165 states have call successors, (165), 59 states have call predecessors, (165), 58 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 20:59:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 653 transitions. [2022-03-20 20:59:02,393 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 653 transitions. Word has length 182 [2022-03-20 20:59:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:02,393 INFO L478 AbstractCegarLoop]: Abstraction has 519 states and 653 transitions. [2022-03-20 20:59:02,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 20:59:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 653 transitions. [2022-03-20 20:59:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 20:59:02,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:02,395 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:02,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:02,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 20:59:02,612 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-03-20 20:59:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:02,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769315801] [2022-03-20 20:59:02,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-03-20 20:59:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112826295] [2022-03-20 20:59:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:02,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11700694] [2022-03-20 20:59:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:02,622 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:59:02,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 20:59:02,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 20:59:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:05,456 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:05,458 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:05,461 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:05,472 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:05,486 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:05,488 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:20,045 WARN L232 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 103 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:59:22,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:22,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112826295] [2022-03-20 20:59:22,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:22,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11700694] [2022-03-20 20:59:22,980 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-20 20:59:22,980 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Infinite/NaN value [2022-03-20 20:59:22,980 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-20 20:59:22,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:23,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:23,181 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1663) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1448) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1378) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.convertApplicationTerm(Substitution.java:53) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.apply(Substitution.java:59) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:400) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:111) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:129) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:203) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-20 20:59:23,184 INFO L158 Benchmark]: Toolchain (without parser) took 499373.32ms. Allocated memory was 186.6MB in the beginning and 269.5MB in the end (delta: 82.8MB). Free memory was 137.5MB in the beginning and 228.9MB in the end (delta: -91.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:59:23,184 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:59:23,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.86ms. Allocated memory is still 186.6MB. Free memory was 137.3MB in the beginning and 161.6MB in the end (delta: -24.3MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-20 20:59:23,185 INFO L158 Benchmark]: Boogie Preprocessor took 41.46ms. Allocated memory is still 186.6MB. Free memory was 161.6MB in the beginning and 160.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 20:59:23,185 INFO L158 Benchmark]: RCFGBuilder took 274.63ms. Allocated memory is still 186.6MB. Free memory was 160.3MB in the beginning and 148.6MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 20:59:23,185 INFO L158 Benchmark]: TraceAbstraction took 498790.80ms. Allocated memory was 186.6MB in the beginning and 269.5MB in the end (delta: 82.8MB). Free memory was 147.7MB in the beginning and 228.9MB in the end (delta: -81.2MB). Peak memory consumption was 1.5MB. Max. memory is 8.0GB. [2022-03-20 20:59:23,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 262.86ms. Allocated memory is still 186.6MB. Free memory was 137.3MB in the beginning and 161.6MB in the end (delta: -24.3MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.46ms. Allocated memory is still 186.6MB. Free memory was 161.6MB in the beginning and 160.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 274.63ms. Allocated memory is still 186.6MB. Free memory was 160.3MB in the beginning and 148.6MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 498790.80ms. Allocated memory was 186.6MB in the beginning and 269.5MB in the end (delta: 82.8MB). Free memory was 147.7MB in the beginning and 228.9MB in the end (delta: -81.2MB). Peak memory consumption was 1.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 20:59:23,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...