/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:51:11,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:51:11,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:51:11,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:51:11,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 20:51:11,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 20:51:11,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 20:51:11,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 20:51:11,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 20:51:11,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 20:51:11,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 20:51:11,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 20:51:11,511 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 20:51:11,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 20:51:11,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 20:51:11,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 20:51:11,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 20:51:11,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 20:51:11,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:51:11,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:51:11,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:51:11,530 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 20:51:11,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:51:11,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:51:11,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:51:11,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:51:11,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:51:11,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:51:11,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:51:11,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:51:11,544 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:51:11,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:51:11,545 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:51:11,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:51:11,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:51:11,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:51:11,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:51:11,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:51:11,803 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:51:11,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 20:51:11,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac08a414d/eb0063a4b83e46e38f80cad12bf8be0e/FLAGa769dd477 [2022-03-20 20:51:12,198 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:51:12,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 20:51:12,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac08a414d/eb0063a4b83e46e38f80cad12bf8be0e/FLAGa769dd477 [2022-03-20 20:51:12,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac08a414d/eb0063a4b83e46e38f80cad12bf8be0e [2022-03-20 20:51:12,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:51:12,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:51:12,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:51:12,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:51:12,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:51:12,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4577de19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12, skipping insertion in model container [2022-03-20 20:51:12,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:51:12,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:51:12,767 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_valuebound100.c[490,503] [2022-03-20 20:51:12,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:51:12,804 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:51:12,819 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_valuebound100.c[490,503] [2022-03-20 20:51:12,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:51:12,850 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:51:12,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12 WrapperNode [2022-03-20 20:51:12,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:51:12,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:51:12,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:51:12,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:51:12,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:51:12,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:51:12,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:51:12,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:51:12,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (1/1) ... [2022-03-20 20:51:12,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:51:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:12,920 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 20:51:12,933 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 20:51:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:51:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:51:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:51:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:51:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:51:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:51:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:51:12,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:51:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:51:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:51:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:51:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:51:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:51:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:51:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:51:13,027 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:51:13,028 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:51:13,236 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:51:13,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:51:13,242 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 20:51:13,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:13 BoogieIcfgContainer [2022-03-20 20:51:13,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:51:13,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:51:13,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:51:13,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:51:13,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:51:12" (1/3) ... [2022-03-20 20:51:13,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a9290c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:51:13, skipping insertion in model container [2022-03-20 20:51:13,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:12" (2/3) ... [2022-03-20 20:51:13,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a9290c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:51:13, skipping insertion in model container [2022-03-20 20:51:13,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:13" (3/3) ... [2022-03-20 20:51:13,256 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2022-03-20 20:51:13,262 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:51:13,262 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:51:13,310 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:51:13,317 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 20:51:13,317 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:51:13,335 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 20:51:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 20:51:13,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:13,346 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 20:51:13,347 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-20 20:51:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42631685] [2022-03-20 20:51:13,369 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-20 20:51:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834760424] [2022-03-20 20:51:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:51:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:51:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:51:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:51:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 20:51:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 20:51:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 20:51:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:51:13,597 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 20:51:13,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834760424] [2022-03-20 20:51:13,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834760424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:13,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:13,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:51:13,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42631685] [2022-03-20 20:51:13,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42631685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:13,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:13,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:51:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949511043] [2022-03-20 20:51:13,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:13,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:51:13,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:51:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:51:13,630 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 20:51:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:13,716 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-20 20:51:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:51:13,718 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 20:51:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:13,724 INFO L225 Difference]: With dead ends: 73 [2022-03-20 20:51:13,725 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 20:51:13,728 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 20:51:13,731 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 20:51:13,731 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 20:51:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 20:51:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 20:51:13,778 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 20:51:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 20:51:13,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 20:51:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:13,781 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 20:51:13,782 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 20:51:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 20:51:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:51:13,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:13,783 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 20:51:13,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:51:13,784 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-20 20:51:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1785097564] [2022-03-20 20:51:13,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-20 20:51:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:13,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913094323] [2022-03-20 20:51:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:13,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:13,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034115865] [2022-03-20 20:51:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:13,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:13,843 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 20:51:13,864 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 20:51:13,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:51:13,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:14,160 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 20:51:14,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:14,328 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 20:51:14,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913094323] [2022-03-20 20:51:14,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034115865] [2022-03-20 20:51:14,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034115865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:14,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:14,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 20:51:14,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:14,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1785097564] [2022-03-20 20:51:14,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1785097564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:14,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:14,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:51:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976185113] [2022-03-20 20:51:14,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:14,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:51:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:51:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:51:14,344 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 20:51:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:14,452 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-20 20:51:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:51:14,453 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 20:51:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:14,454 INFO L225 Difference]: With dead ends: 52 [2022-03-20 20:51:14,455 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 20:51:14,456 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 20:51:14,457 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 20:51:14,461 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 20:51:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 20:51:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 20:51:14,474 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 20:51:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 20:51:14,475 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 20:51:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:14,476 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 20:51:14,476 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 20:51:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 20:51:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 20:51:14,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:14,477 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 20:51:14,499 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 20:51:14,691 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 20:51:14,691 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-20 20:51:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537514390] [2022-03-20 20:51:14,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-20 20:51:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561144950] [2022-03-20 20:51:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:14,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:14,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782837153] [2022-03-20 20:51:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:14,718 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 20:51:14,722 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 20:51:14,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:51:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:51:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:14,866 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 20:51:14,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:14,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561144950] [2022-03-20 20:51:14,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782837153] [2022-03-20 20:51:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782837153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:14,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:14,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:14,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537514390] [2022-03-20 20:51:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537514390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:14,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:14,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337814825] [2022-03-20 20:51:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:14,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:14,870 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 20:51:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:14,915 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-20 20:51:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:14,915 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 20:51:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:14,917 INFO L225 Difference]: With dead ends: 50 [2022-03-20 20:51:14,917 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 20:51:14,918 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 20:51:14,927 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 20:51:14,928 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 20:51:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 20:51:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-20 20:51:14,938 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 20:51:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-20 20:51:14,939 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-20 20:51:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:14,940 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-20 20:51:14,940 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 20:51:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-20 20:51:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 20:51:14,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:14,941 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 20:51:14,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 20:51:15,163 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 20:51:15,164 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:15,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-20 20:51:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:15,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322691201] [2022-03-20 20:51:15,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-20 20:51:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084216606] [2022-03-20 20:51:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:15,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:15,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187348938] [2022-03-20 20:51:15,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:15,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:15,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:15,183 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 20:51:15,203 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 20:51:15,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:15,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:15,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:15,362 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 20:51:15,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084216606] [2022-03-20 20:51:15,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187348938] [2022-03-20 20:51:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187348938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:15,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322691201] [2022-03-20 20:51:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322691201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:15,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:15,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629986053] [2022-03-20 20:51:15,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:15,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:15,365 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 20:51:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:15,396 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-20 20:51:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:15,397 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 20:51:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:15,399 INFO L225 Difference]: With dead ends: 58 [2022-03-20 20:51:15,399 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 20:51:15,400 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 20:51:15,400 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 20:51:15,401 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 20:51:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 20:51:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 20:51:15,410 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 20:51:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-20 20:51:15,411 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-20 20:51:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:15,412 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-20 20:51:15,412 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 20:51:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-20 20:51:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 20:51:15,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:15,413 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 20:51:15,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:51:15,635 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 20:51:15,635 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-20 20:51:15,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:15,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133939466] [2022-03-20 20:51:15,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-20 20:51:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712525394] [2022-03-20 20:51:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:15,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:15,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:15,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645261858] [2022-03-20 20:51:15,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:15,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:15,655 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 20:51:15,656 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 20:51:15,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:15,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:15,851 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 20:51:15,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712525394] [2022-03-20 20:51:15,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645261858] [2022-03-20 20:51:15,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645261858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:15,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:15,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:15,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:15,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133939466] [2022-03-20 20:51:15,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133939466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:15,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:15,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893389954] [2022-03-20 20:51:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:15,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:15,854 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 20:51:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:15,899 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-20 20:51:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:15,899 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 20:51:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:15,900 INFO L225 Difference]: With dead ends: 62 [2022-03-20 20:51:15,900 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:51:15,901 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 20:51:15,901 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 20:51:15,901 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 20:51:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:51:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 20:51:15,910 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 20:51:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-20 20:51:15,911 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-20 20:51:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:15,912 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-20 20:51:15,912 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 20:51:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-20 20:51:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 20:51:15,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:15,913 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 20:51:15,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 20:51:16,127 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 20:51:16,127 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-20 20:51:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:16,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538503993] [2022-03-20 20:51:16,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-20 20:51:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944275402] [2022-03-20 20:51:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:16,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:16,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197326077] [2022-03-20 20:51:16,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:16,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:16,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:16,161 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 20:51:16,184 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 20:51:16,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:51:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:16,460 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 20:51:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:16,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:16,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944275402] [2022-03-20 20:51:16,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197326077] [2022-03-20 20:51:16,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197326077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:16,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:16,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 20:51:16,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538503993] [2022-03-20 20:51:16,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538503993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:16,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:16,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:51:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763770249] [2022-03-20 20:51:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:16,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:51:16,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:51:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:51:16,578 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 20:51:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:16,694 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-20 20:51:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:51:16,695 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 20:51:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:16,698 INFO L225 Difference]: With dead ends: 66 [2022-03-20 20:51:16,698 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 20:51:16,698 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 20:51:16,699 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 20:51:16,699 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 20:51:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 20:51:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 20:51:16,709 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 20:51:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-20 20:51:16,710 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-20 20:51:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:16,711 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-20 20:51:16,711 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 20:51:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-20 20:51:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 20:51:16,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:16,712 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 20:51:16,737 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 20:51:16,927 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 20:51:16,927 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-20 20:51:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021154663] [2022-03-20 20:51:16,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-20 20:51:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171441849] [2022-03-20 20:51:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:16,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:16,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081153167] [2022-03-20 20:51:16,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:16,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:16,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:16,949 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 20:51:16,950 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 20:51:16,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:51:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:17,144 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 20:51:17,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:17,260 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 20:51:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:17,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171441849] [2022-03-20 20:51:17,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:17,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081153167] [2022-03-20 20:51:17,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081153167] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:17,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:17,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 20:51:17,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:17,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021154663] [2022-03-20 20:51:17,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021154663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:17,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:17,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:17,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942076430] [2022-03-20 20:51:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:17,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:17,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:51:17,262 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 20:51:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:17,303 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 20:51:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:51:17,304 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 20:51:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:17,305 INFO L225 Difference]: With dead ends: 69 [2022-03-20 20:51:17,305 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 20:51:17,305 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 20:51:17,306 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 20:51:17,306 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 20:51:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 20:51:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-20 20:51:17,317 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 20:51:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 20:51:17,318 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-20 20:51:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:17,318 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 20:51:17,318 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 20:51:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 20:51:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:51:17,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:17,319 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 20:51:17,336 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 20:51:17,522 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 20:51:17,522 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-20 20:51:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012701682] [2022-03-20 20:51:17,523 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-20 20:51:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928500624] [2022-03-20 20:51:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:17,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:17,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923262857] [2022-03-20 20:51:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:17,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:17,535 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 20:51:17,536 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 20:51:17,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:51:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:17,730 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 20:51:17,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:17,907 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 20:51:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928500624] [2022-03-20 20:51:17,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923262857] [2022-03-20 20:51:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923262857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:17,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:17,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:51:17,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012701682] [2022-03-20 20:51:17,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012701682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:17,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:17,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:51:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537244386] [2022-03-20 20:51:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:17,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:51:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:51:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:51:17,910 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 20:51:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:18,073 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-20 20:51:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:51:18,073 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 20:51:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:18,075 INFO L225 Difference]: With dead ends: 106 [2022-03-20 20:51:18,075 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 20:51:18,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:51:18,075 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 20:51:18,076 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 20:51:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 20:51:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 20:51:18,091 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 20:51:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 20:51:18,092 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 20:51:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:18,093 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 20:51:18,093 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 20:51:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 20:51:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 20:51:18,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:18,094 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 20:51:18,122 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 20:51:18,319 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 20:51:18,319 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:18,320 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-20 20:51:18,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243399084] [2022-03-20 20:51:18,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-20 20:51:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752370735] [2022-03-20 20:51:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:18,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527131819] [2022-03-20 20:51:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:18,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:18,346 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 20:51:18,369 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 20:51:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 20:51:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:18,617 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 20:51:18,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:18,803 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 20:51:18,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:18,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752370735] [2022-03-20 20:51:18,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527131819] [2022-03-20 20:51:18,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527131819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:18,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:18,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 20:51:18,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243399084] [2022-03-20 20:51:18,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243399084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:18,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:18,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:51:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911193230] [2022-03-20 20:51:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:18,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:51:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:51:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:51:18,806 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 20:51:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:18,997 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-20 20:51:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:51:18,998 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 20:51:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:18,999 INFO L225 Difference]: With dead ends: 124 [2022-03-20 20:51:18,999 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 20:51:19,000 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 20:51:19,000 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 20:51:19,000 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 20:51:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 20:51:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-20 20:51:19,022 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 20:51:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-20 20:51:19,023 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-20 20:51:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:19,023 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-20 20:51:19,024 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 20:51:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-20 20:51:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 20:51:19,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:19,025 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 20:51:19,055 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 20:51:19,251 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 20:51:19,252 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-20 20:51:19,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:19,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497414366] [2022-03-20 20:51:19,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-20 20:51:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:19,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63510450] [2022-03-20 20:51:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:19,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460367202] [2022-03-20 20:51:19,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:51:19,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:19,264 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 20:51:19,287 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 20:51:19,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:51:19,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 20:51:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 20:51:19,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 20:51:20,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63510450] [2022-03-20 20:51:20,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460367202] [2022-03-20 20:51:20,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460367202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:20,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:20,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-20 20:51:20,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497414366] [2022-03-20 20:51:20,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497414366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:20,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:20,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:51:20,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643895412] [2022-03-20 20:51:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:20,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:51:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:51:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:51:20,109 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:51:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:20,372 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-03-20 20:51:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:51:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 20:51:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:20,374 INFO L225 Difference]: With dead ends: 130 [2022-03-20 20:51:20,374 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 20:51:20,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:51:20,375 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:20,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:51:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 20:51:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-20 20:51:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 20:51:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2022-03-20 20:51:20,394 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 80 [2022-03-20 20:51:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:20,394 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2022-03-20 20:51:20,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 20:51:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2022-03-20 20:51:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 20:51:20,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:20,395 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 20:51:20,420 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 20:51:20,611 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 20:51:20,611 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-20 20:51:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233969531] [2022-03-20 20:51:20,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-20 20:51:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903201557] [2022-03-20 20:51:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:20,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995810608] [2022-03-20 20:51:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:51:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:20,625 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 20:51:20,634 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 20:51:20,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:51:20,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:20,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 20:51:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:21,215 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 20:51:21,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903201557] [2022-03-20 20:51:21,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995810608] [2022-03-20 20:51:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995810608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:51:21,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:51:21,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 20:51:21,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233969531] [2022-03-20 20:51:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233969531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:21,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:21,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:51:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584305240] [2022-03-20 20:51:21,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:21,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:51:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:51:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:51:21,329 INFO L87 Difference]: Start difference. First operand 126 states and 172 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 20:51:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:21,731 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-20 20:51:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:51:21,735 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 20:51:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:21,736 INFO L225 Difference]: With dead ends: 134 [2022-03-20 20:51:21,737 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 20:51:21,737 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 20:51:21,737 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:21,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:51:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 20:51:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-20 20:51:21,755 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 20:51:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-20 20:51:21,756 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 85 [2022-03-20 20:51:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:21,756 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-20 20:51:21,756 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 20:51:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-20 20:51:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:51:21,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:21,757 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 20:51:21,781 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 20:51:21,971 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 20:51:21,971 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-20 20:51:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:21,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945937047] [2022-03-20 20:51:21,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-20 20:51:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469807636] [2022-03-20 20:51:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:21,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:21,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317644347] [2022-03-20 20:51:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:21,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:21,991 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 20:51:21,992 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 20:51:22,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 20:51:22,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:22,543 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 20:51:22,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:22,914 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 20:51:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469807636] [2022-03-20 20:51:22,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317644347] [2022-03-20 20:51:22,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317644347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:22,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:22,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 20:51:22,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:22,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945937047] [2022-03-20 20:51:22,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945937047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:22,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:22,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:51:22,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36978427] [2022-03-20 20:51:22,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:22,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:51:22,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:22,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:51:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:51:22,916 INFO L87 Difference]: Start difference. First operand 130 states and 175 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 20:51:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:23,165 INFO L93 Difference]: Finished difference Result 157 states and 211 transitions. [2022-03-20 20:51:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:51:23,166 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 20:51:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:23,167 INFO L225 Difference]: With dead ends: 157 [2022-03-20 20:51:23,167 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 20:51:23,168 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 20:51:23,168 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:51:23,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:51:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 20:51:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-03-20 20:51:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:51:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2022-03-20 20:51:23,190 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 91 [2022-03-20 20:51:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:23,190 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2022-03-20 20:51:23,190 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 20:51:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2022-03-20 20:51:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 20:51:23,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:23,191 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 20:51:23,215 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 20:51:23,405 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 20:51:23,405 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-20 20:51:23,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:23,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716257585] [2022-03-20 20:51:23,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-20 20:51:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467398559] [2022-03-20 20:51:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:23,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:23,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332966263] [2022-03-20 20:51:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:23,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:23,417 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 20:51:23,435 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 20:51:23,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:51:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:23,597 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 20:51:23,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:51:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467398559] [2022-03-20 20:51:23,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332966263] [2022-03-20 20:51:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332966263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:23,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:23,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716257585] [2022-03-20 20:51:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716257585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:23,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:51:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281771302] [2022-03-20 20:51:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:23,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:51:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:51:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:51:23,599 INFO L87 Difference]: Start difference. First operand 153 states and 206 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 20:51:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:51:23,660 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-03-20 20:51:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:51:23,660 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 20:51:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:51:23,662 INFO L225 Difference]: With dead ends: 201 [2022-03-20 20:51:23,662 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 20:51:23,663 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 20:51:23,663 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 20:51:23,663 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 20:51:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 20:51:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-20 20:51:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 20:51:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-03-20 20:51:23,686 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 100 [2022-03-20 20:51:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:51:23,687 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-03-20 20:51:23,687 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 20:51:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-03-20 20:51:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 20:51:23,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:51:23,688 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 20:51:23,714 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 20:51:23,904 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 20:51:23,904 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:51:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:51:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-20 20:51:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:23,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026907061] [2022-03-20 20:51:23,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:51:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-20 20:51:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:51:23,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810132896] [2022-03-20 20:51:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:51:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:51:23,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:51:23,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543560529] [2022-03-20 20:51:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:51:23,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:51:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:51:23,916 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 20:51:23,917 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 20:51:23,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:51:23,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:51:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 20:51:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:51:25,045 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 20:51:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:51:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 20:51:58,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:51:58,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810132896] [2022-03-20 20:51:58,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:51:58,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543560529] [2022-03-20 20:51:58,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543560529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:51:58,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:51:58,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 20:51:58,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:51:58,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026907061] [2022-03-20 20:51:58,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026907061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:51:58,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:51:58,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:51:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862143577] [2022-03-20 20:51:58,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:51:58,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:51:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:51:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:51:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:51:58,922 INFO L87 Difference]: Start difference. First operand 147 states and 195 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 20:52:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:02,174 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-03-20 20:52:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:52:02,175 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 20:52:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:02,176 INFO L225 Difference]: With dead ends: 154 [2022-03-20 20:52:02,176 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 20:52:02,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:52:02,177 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:02,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 396 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:52:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 20:52:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2022-03-20 20:52:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 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 20:52:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-03-20 20:52:02,217 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 107 [2022-03-20 20:52:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:02,219 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-03-20 20:52:02,219 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 20:52:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-03-20 20:52:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 20:52:02,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:02,221 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 20:52:02,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 20:52:02,435 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 20:52:02,435 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-20 20:52:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765600708] [2022-03-20 20:52:02,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-20 20:52:02,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:02,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214373293] [2022-03-20 20:52:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:02,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:02,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:02,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239237613] [2022-03-20 20:52:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:02,453 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 20:52:02,455 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 20:52:02,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:02,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 20:52:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 20:52:03,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 20:52:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214373293] [2022-03-20 20:52:06,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239237613] [2022-03-20 20:52:06,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239237613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:06,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:06,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-03-20 20:52:06,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765600708] [2022-03-20 20:52:06,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765600708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:06,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:06,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:52:06,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659166198] [2022-03-20 20:52:06,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:06,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:52:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:52:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:52:06,145 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:52:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:06,835 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-03-20 20:52:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:52:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2022-03-20 20:52:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:06,836 INFO L225 Difference]: With dead ends: 162 [2022-03-20 20:52:06,836 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 20:52:06,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:52:06,837 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:06,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 549 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 20:52:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 20:52:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-20 20:52:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 85 states have internal predecessors, (94), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 20:52:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-20 20:52:06,865 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 113 [2022-03-20 20:52:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:06,865 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-20 20:52:06,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 20:52:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-20 20:52:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 20:52:06,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:06,867 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 20:52:06,890 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 20:52:07,090 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 20:52:07,090 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-20 20:52:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307923343] [2022-03-20 20:52:07,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-20 20:52:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:07,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810894412] [2022-03-20 20:52:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:07,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735758937] [2022-03-20 20:52:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:52:07,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:07,104 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 20:52:07,104 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 20:52:07,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:52:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:52:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:07,319 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 20:52:07,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:07,471 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 20:52:07,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810894412] [2022-03-20 20:52:07,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735758937] [2022-03-20 20:52:07,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735758937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:07,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:07,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 20:52:07,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307923343] [2022-03-20 20:52:07,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307923343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:07,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:07,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:52:07,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025416392] [2022-03-20 20:52:07,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:07,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:52:07,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:52:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:52:07,473 INFO L87 Difference]: Start difference. First operand 157 states and 209 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 20:52:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:07,676 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2022-03-20 20:52:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:52:07,677 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 20:52:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:07,679 INFO L225 Difference]: With dead ends: 211 [2022-03-20 20:52:07,679 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 20:52:07,680 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 20:52:07,680 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 20:52:07,680 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 20:52:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 20:52:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2022-03-20 20:52:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 75 states have call successors, (75), 15 states have call predecessors, (75), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 20:52:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2022-03-20 20:52:07,714 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 116 [2022-03-20 20:52:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:07,714 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2022-03-20 20:52:07,714 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 20:52:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2022-03-20 20:52:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 20:52:07,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:07,716 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 20:52:07,740 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 20:52:07,935 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 20:52:07,935 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-20 20:52:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:07,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231489147] [2022-03-20 20:52:07,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-20 20:52:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694694299] [2022-03-20 20:52:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:07,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:07,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344995783] [2022-03-20 20:52:07,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:07,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:07,949 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 20:52:07,950 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 20:52:08,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:08,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:52:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:08,165 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 20:52:08,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:08,376 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 20:52:08,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694694299] [2022-03-20 20:52:08,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344995783] [2022-03-20 20:52:08,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344995783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:08,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:08,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:52:08,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231489147] [2022-03-20 20:52:08,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231489147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:08,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:08,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:52:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167497144] [2022-03-20 20:52:08,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:08,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:52:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:52:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:52:08,379 INFO L87 Difference]: Start difference. First operand 184 states and 256 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 20:52:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:08,543 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-03-20 20:52:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:52:08,545 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 20:52:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:08,546 INFO L225 Difference]: With dead ends: 198 [2022-03-20 20:52:08,546 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 20:52:08,547 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 20:52:08,547 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:08,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:52:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 20:52:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-20 20:52:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 73 states have call successors, (73), 18 states have call predecessors, (73), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 20:52:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2022-03-20 20:52:08,583 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 122 [2022-03-20 20:52:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:08,584 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2022-03-20 20:52:08,584 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 20:52:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2022-03-20 20:52:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 20:52:08,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:08,585 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 20:52:08,603 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 20:52:08,791 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 20:52:08,791 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-20 20:52:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926093960] [2022-03-20 20:52:08,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-20 20:52:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301800168] [2022-03-20 20:52:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:08,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:08,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682329452] [2022-03-20 20:52:08,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:52:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:08,802 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 20:52:08,804 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 20:52:08,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:52:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 20:52:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:09,538 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 20:52:09,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:10,455 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 20:52:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:10,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301800168] [2022-03-20 20:52:10,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:10,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682329452] [2022-03-20 20:52:10,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682329452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:52:10,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:52:10,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-20 20:52:10,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:10,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926093960] [2022-03-20 20:52:10,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926093960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:10,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:10,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:52:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899686772] [2022-03-20 20:52:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:10,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:52:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:52:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:52:10,457 INFO L87 Difference]: Start difference. First operand 194 states and 262 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 20:52:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:10,868 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-03-20 20:52:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:52:10,869 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 20:52:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:10,871 INFO L225 Difference]: With dead ends: 265 [2022-03-20 20:52:10,871 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 20:52:10,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:52:10,872 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:10,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 562 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:52:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 20:52:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-03-20 20:52:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 140 states have internal predecessors, (158), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-20 20:52:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2022-03-20 20:52:10,922 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 127 [2022-03-20 20:52:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:10,922 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2022-03-20 20:52:10,922 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 20:52:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2022-03-20 20:52:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 20:52:10,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:10,924 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 20:52:10,950 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 20:52:11,142 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 20:52:11,142 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-20 20:52:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247402014] [2022-03-20 20:52:11,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-20 20:52:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838810549] [2022-03-20 20:52:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:11,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:11,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676688775] [2022-03-20 20:52:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:52:11,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:11,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:11,158 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 20:52:11,160 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 20:52:11,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:52:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:11,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 20:52:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 20:52:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:15,350 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:52:28,742 WARN L232 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:52:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:52:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838810549] [2022-03-20 20:52:28,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:52:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676688775] [2022-03-20 20:52:28,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676688775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:52:28,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:52:28,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 20:52:28,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:52:28,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247402014] [2022-03-20 20:52:28,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247402014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:52:28,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:52:28,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:52:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465716013] [2022-03-20 20:52:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:52:28,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:52:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:52:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=435, Unknown=3, NotChecked=0, Total=552 [2022-03-20 20:52:28,745 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:52:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:52:29,827 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-03-20 20:52:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:52:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-20 20:52:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:52:29,829 INFO L225 Difference]: With dead ends: 268 [2022-03-20 20:52:29,829 INFO L226 Difference]: Without dead ends: 266 [2022-03-20 20:52:29,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=159, Invalid=650, Unknown=3, NotChecked=0, Total=812 [2022-03-20 20:52:29,830 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:52:29,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 392 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:52:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-20 20:52:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-03-20 20:52:29,877 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 20:52:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-20 20:52:29,879 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 129 [2022-03-20 20:52:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:52:29,880 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-20 20:52:29,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 20:52:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-20 20:52:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 20:52:29,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:52:29,882 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 20:52:29,905 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 20:52:30,102 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 20:52:30,102 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:52:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:52:30,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-20 20:52:30,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:52:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466240368] [2022-03-20 20:52:30,103 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:52:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-20 20:52:30,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:52:30,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158249920] [2022-03-20 20:52:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:52:30,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:52:30,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:52:30,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283522090] [2022-03-20 20:52:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:52:30,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:52:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:52:30,111 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 20:52:30,115 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 20:52:30,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:52:30,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:52:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 20:52:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:52:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 103 proven. 117 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 20:52:31,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:52:51,459 WARN L232 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 20:52:56,560 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* (- 1) c_main_~c~0)) (.cse3 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) (* (- 1) c_main_~q~0 c_main_~k~0)))) (.cse4 (+ c_main_~s~0 (* c_main_~s~0 c_main_~k~0) (* (- 1) c_main_~r~0))) (.cse0 (* c_main_~q~0 c_main_~x~0)) (.cse1 (* c_main_~s~0 c_main_~y~0))) (let ((.cse8 (+ .cse0 .cse1)) (.cse6 (* .cse4 c_main_~y~0)) (.cse7 (* .cse3 c_main_~x~0)) (.cse5 (+ .cse0 .cse2 .cse1))) (or (not (= (+ .cse0 .cse1 (* 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))) (= (+ .cse0 .cse2 (* .cse3 c_main_~xy~0) .cse1 (* c_main_~yy~0 .cse4)) (+ (* .cse5 c_main_~y~0) .cse6 .cse7)) (<= (* 2 c_main_~c~0) .cse8) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 .cse8)) (not (= (+ .cse6 .cse7) .cse5))))) is different from true [2022-03-20 20:53:25,172 WARN L232 SmtUtils]: Spent 9.29s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:54:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 113 proven. 78 refuted. 8 times theorem prover too weak. 348 trivial. 3 not checked. [2022-03-20 20:54:15,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158249920] [2022-03-20 20:54:15,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283522090] [2022-03-20 20:54:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283522090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:15,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2022-03-20 20:54:15,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466240368] [2022-03-20 20:54:15,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466240368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:15,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:15,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:54:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331434293] [2022-03-20 20:54:15,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:15,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:54:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:54:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=625, Unknown=8, NotChecked=54, Total=870 [2022-03-20 20:54:15,533 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 20:54:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:16,757 INFO L93 Difference]: Finished difference Result 277 states and 364 transitions. [2022-03-20 20:54:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:54:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-20 20:54:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:16,759 INFO L225 Difference]: With dead ends: 277 [2022-03-20 20:54:16,759 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 20:54:16,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=262, Invalid=924, Unknown=8, NotChecked=66, Total=1260 [2022-03-20 20:54:16,760 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:16,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 552 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:54:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 20:54:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2022-03-20 20:54:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 20:54:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-03-20 20:54:16,804 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-03-20 20:54:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:16,805 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-03-20 20:54:16,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 20:54:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-03-20 20:54:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 20:54:16,806 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:16,806 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 20:54:16,829 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 20:54:17,020 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 20:54:17,021 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-20 20:54:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009073847] [2022-03-20 20:54:17,022 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:17,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-20 20:54:17,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:17,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667211302] [2022-03-20 20:54:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:17,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:17,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:17,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362619697] [2022-03-20 20:54:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:54:17,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:17,031 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 20:54:17,035 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 20:54:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:54:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 20:54:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:17,863 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 20:54:17,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:19,766 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 20:54:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667211302] [2022-03-20 20:54:19,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362619697] [2022-03-20 20:54:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362619697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:19,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-20 20:54:19,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:19,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009073847] [2022-03-20 20:54:19,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009073847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:19,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:19,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:54:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308505113] [2022-03-20 20:54:19,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:19,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:54:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:54:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:54:19,769 INFO L87 Difference]: Start difference. First operand 239 states and 315 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 20:54:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:20,922 INFO L93 Difference]: Finished difference Result 284 states and 377 transitions. [2022-03-20 20:54:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:54:20,922 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 20:54:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:20,924 INFO L225 Difference]: With dead ends: 284 [2022-03-20 20:54:20,924 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 20:54:20,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-20 20:54:20,925 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 35 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:20,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 427 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:54:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 20:54:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2022-03-20 20:54:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 20:54:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 370 transitions. [2022-03-20 20:54:20,993 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 370 transitions. Word has length 135 [2022-03-20 20:54:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:20,993 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 370 transitions. [2022-03-20 20:54:20,993 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 20:54:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 370 transitions. [2022-03-20 20:54:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 20:54:20,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:20,994 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 20:54:21,021 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 20:54:21,207 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 20:54:21,207 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-20 20:54:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413503683] [2022-03-20 20:54:21,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-20 20:54:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132243097] [2022-03-20 20:54:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:21,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:21,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967849136] [2022-03-20 20:54:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:54:21,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:21,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:21,217 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 20:54:21,219 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 20:54:21,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:54:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 20:54:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:22,954 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:22,958 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:54:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 144 proven. 111 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 20:54:23,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:28,028 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 20:54:28,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132243097] [2022-03-20 20:54:28,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967849136] [2022-03-20 20:54:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967849136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:28,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:28,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2022-03-20 20:54:28,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413503683] [2022-03-20 20:54:28,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413503683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:28,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:28,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 20:54:28,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085541126] [2022-03-20 20:54:28,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:28,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 20:54:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 20:54:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 20:54:28,030 INFO L87 Difference]: Start difference. First operand 278 states and 370 transitions. Second operand has 23 states, 20 states have (on average 1.8) 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), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 20:54:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:34,168 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2022-03-20 20:54:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:54:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) 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), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-20 20:54:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:34,172 INFO L225 Difference]: With dead ends: 327 [2022-03-20 20:54:34,172 INFO L226 Difference]: Without dead ends: 324 [2022-03-20 20:54:34,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 20:54:34,173 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:34,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 644 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 20:54:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-20 20:54:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-03-20 20:54:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 174 states have internal predecessors, (196), 117 states have call successors, (117), 31 states have call predecessors, (117), 30 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 20:54:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 428 transitions. [2022-03-20 20:54:34,234 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 428 transitions. Word has length 138 [2022-03-20 20:54:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:34,234 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 428 transitions. [2022-03-20 20:54:34,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) 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), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 20:54:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 428 transitions. [2022-03-20 20:54:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 20:54:34,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:34,235 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 20:54:34,252 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 20:54:34,436 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 20:54:34,436 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-20 20:54:34,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216883184] [2022-03-20 20:54:34,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-20 20:54:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:34,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053779705] [2022-03-20 20:54:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:34,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616803353] [2022-03-20 20:54:34,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:54:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:34,446 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 20:54:34,447 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 20:54:34,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:54:34,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 20:54:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:35,005 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 20:54:35,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:54:35,418 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 20:54:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:54:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053779705] [2022-03-20 20:54:35,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:54:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616803353] [2022-03-20 20:54:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616803353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:54:35,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:54:35,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-20 20:54:35,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:54:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216883184] [2022-03-20 20:54:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216883184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:54:35,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:54:35,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:54:35,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065325952] [2022-03-20 20:54:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:54:35,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:54:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:54:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:54:35,420 INFO L87 Difference]: Start difference. First operand 321 states and 428 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 20:54:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:54:35,992 INFO L93 Difference]: Finished difference Result 360 states and 478 transitions. [2022-03-20 20:54:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:54:35,993 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 20:54:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:54:35,995 INFO L225 Difference]: With dead ends: 360 [2022-03-20 20:54:35,995 INFO L226 Difference]: Without dead ends: 358 [2022-03-20 20:54:35,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:54:35,996 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:54:35,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 477 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:54:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-20 20:54:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2022-03-20 20:54:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 191 states have (on average 1.130890052356021) internal successors, (216), 192 states have internal predecessors, (216), 129 states have call successors, (129), 34 states have call predecessors, (129), 33 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-20 20:54:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-03-20 20:54:36,080 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 149 [2022-03-20 20:54:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:54:36,080 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-03-20 20:54:36,080 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 20:54:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-03-20 20:54:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 20:54:36,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:54:36,082 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2022-03-20 20:54:36,105 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 20:54:36,295 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 20:54:36,295 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:54:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:54:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-03-20 20:54:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:54:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372860819] [2022-03-20 20:54:36,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:54:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-03-20 20:54:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:54:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251760930] [2022-03-20 20:54:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:54:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:54:36,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:54:36,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106825108] [2022-03-20 20:54:36,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:54:36,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:54:36,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:54:36,317 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 20:54:36,342 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 20:54:36,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:54:36,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:54:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 20:54:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:54:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 170 proven. 175 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-20 20:54:37,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:55:01,318 WARN L232 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:55:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 157 proven. 119 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-20 20:55:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:55:19,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251760930] [2022-03-20 20:55:19,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:55:19,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106825108] [2022-03-20 20:55:19,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106825108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:55:19,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:55:19,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 20:55:19,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:55:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372860819] [2022-03-20 20:55:19,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372860819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:55:19,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:55:19,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 20:55:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627640896] [2022-03-20 20:55:19,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:55:19,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 20:55:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:55:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 20:55:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:55:19,165 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-20 20:55:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:55:20,437 INFO L93 Difference]: Finished difference Result 363 states and 480 transitions. [2022-03-20 20:55:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:55:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2022-03-20 20:55:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:55:20,440 INFO L225 Difference]: With dead ends: 363 [2022-03-20 20:55:20,440 INFO L226 Difference]: Without dead ends: 361 [2022-03-20 20:55:20,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 20:55:20,440 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 20:55:20,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 456 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 20:55:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-20 20:55:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 325. [2022-03-20 20:55:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 177 states have internal predecessors, (199), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 20:55:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-03-20 20:55:20,519 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 151 [2022-03-20 20:55:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:55:20,519 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-03-20 20:55:20,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-20 20:55:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-03-20 20:55:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 20:55:20,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:55:20,521 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 20:55:20,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 20:55:20,738 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 20:55:20,739 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:55:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:55:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-03-20 20:55:20,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:55:20,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462267553] [2022-03-20 20:55:20,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:55:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-03-20 20:55:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:55:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313337105] [2022-03-20 20:55:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:55:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:55:20,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:55:20,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139956290] [2022-03-20 20:55:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:55:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:55:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:55:20,748 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 20:55:20,749 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 20:55:20,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:55:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:55:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 20:55:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:55:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 225 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 20:55:22,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:55:34,508 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:55:49,840 WARN L232 SmtUtils]: Spent 12.77s on a formula simplification. DAG size of input: 74 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 20:57:40,228 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (not (= |c___VERIFIER_assert_#in~cond| 1)) (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (and (not (= (+ (* v_main_~p~0_BEFORE_CALL_303 v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323) (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190 .cse4) (* v_main_~xy~0_BEFORE_CALL_200 .cse4 v_main_~q~0_BEFORE_CALL_370)) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370) (* v_main_~p~0_BEFORE_CALL_303 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) (* v_main_~yy~0_BEFORE_CALL_190 v_main_~r~0_BEFORE_CALL_323)))) (= .cse3 (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370))))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10))))))) is different from true [2022-03-20 20:59:34,553 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (and (not (= (+ (* v_main_~p~0_BEFORE_CALL_303 v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323) (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190 .cse4) (* v_main_~xy~0_BEFORE_CALL_200 .cse4 v_main_~q~0_BEFORE_CALL_370)) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370) (* v_main_~p~0_BEFORE_CALL_303 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) (* v_main_~yy~0_BEFORE_CALL_190 v_main_~r~0_BEFORE_CALL_323)))) (= .cse3 (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370))))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10)))))))) is different from true [2022-03-20 21:00:42,855 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (and (not (= (+ (* v_main_~p~0_BEFORE_CALL_303 v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323) (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190 .cse4) (* v_main_~xy~0_BEFORE_CALL_200 .cse4 v_main_~q~0_BEFORE_CALL_370)) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370) (* v_main_~p~0_BEFORE_CALL_303 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~y~0_BEFORE_CALL_394 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) (* v_main_~yy~0_BEFORE_CALL_190 v_main_~r~0_BEFORE_CALL_323)))) (= .cse3 (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370))))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10))))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 21:01:55,482 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~q~0_BEFORE_CALL_370 Int) (v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~r~0_BEFORE_CALL_323 Int) (v_main_~y~0_BEFORE_CALL_394 Int) (v_main_~xy~0_BEFORE_CALL_200 Int) (v_main_~x~0_BEFORE_CALL_388 Int) (v_main_~yy~0_BEFORE_CALL_190 Int) (v_main_~s~0_BEFORE_CALL_376 Int) (v_main_~p~0_BEFORE_CALL_303 Int)) (let ((.cse9 (+ v_main_~p~0_BEFORE_CALL_303 (* (- 1) v_main_~k~0_BEFORE_CALL_255 v_main_~q~0_BEFORE_CALL_370))) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_255 v_main_~s~0_BEFORE_CALL_376)) v_main_~r~0_BEFORE_CALL_323)) (.cse0 (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376)) (.cse1 (* v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) (.cse7 (* v_main_~y~0_BEFORE_CALL_394 v_main_~r~0_BEFORE_CALL_323)) (.cse8 (* v_main_~p~0_BEFORE_CALL_303 v_main_~x~0_BEFORE_CALL_388))) (let ((.cse3 (+ .cse7 .cse8)) (.cse2 (+ .cse0 .cse1)) (.cse5 (* v_main_~y~0_BEFORE_CALL_394 .cse10)) (.cse6 (* .cse9 v_main_~x~0_BEFORE_CALL_388))) (or (not (= (+ .cse0 .cse1 (* v_main_~s~0_BEFORE_CALL_376 v_main_~yy~0_BEFORE_CALL_190) (* v_main_~xy~0_BEFORE_CALL_200 v_main_~q~0_BEFORE_CALL_370)) (+ .cse0 .cse1 (* .cse2 v_main_~y~0_BEFORE_CALL_394)))) (<= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376) .cse1 (* v_main_~k~0_BEFORE_CALL_255 v_main_~x~0_BEFORE_CALL_388 v_main_~q~0_BEFORE_CALL_370)) .cse3) (= .cse3 (let ((.cse4 (div (+ .cse7 (* (- 1) .cse5) (* (- 1) .cse6) .cse8) .cse2))) (+ (* v_main_~y~0_BEFORE_CALL_394 v_main_~s~0_BEFORE_CALL_376 .cse4) .cse5 .cse6 (* v_main_~x~0_BEFORE_CALL_388 .cse4 v_main_~q~0_BEFORE_CALL_370)))) (= (+ .cse5 .cse6 (* v_main_~y~0_BEFORE_CALL_394 (+ .cse5 .cse6))) (+ .cse5 .cse6 (* .cse9 v_main_~xy~0_BEFORE_CALL_200) (* v_main_~yy~0_BEFORE_CALL_190 .cse10)))))))) is different from true [2022-03-20 21:03:31,900 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse2 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse6 (* .cse2 c_main_~y~0)) (.cse7 (* .cse3 c_main_~x~0))) (let ((.cse4 (* c_main_~q~0 c_main_~xy~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0)) (.cse0 (+ .cse6 .cse7)) (.cse8 (* c_main_~q~0 c_main_~x~0)) (.cse9 (* c_main_~s~0 c_main_~y~0))) (or (not (= c_main_~c~0 .cse0)) (let ((.cse1 (div (+ (* .cse6 2) (* 2 .cse7)) .cse0))) (= (+ (* c_main_~yy~0 .cse1 .cse2) (* .cse1 c_main_~xy~0 .cse3) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse4 .cse5 (* .cse1 .cse3 c_main_~x~0 c_main_~y~0) (* .cse1 .cse2 c_main_~y~0 c_main_~y~0)))) (not (= (+ .cse8 .cse9 (* c_main_~b~0 c_main_~y~0)) (+ .cse4 .cse5 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= (+ .cse6 (* c_main_~xy~0 .cse3) .cse7 (* c_main_~yy~0 .cse2)) (+ .cse6 (* .cse0 c_main_~y~0) .cse7))) (not (= c_main_~b~0 (+ .cse8 .cse9))) (<= (+ (* 3 (* c_main_~p~0 c_main_~x~0)) (* 3 (* c_main_~r~0 c_main_~y~0))) (+ .cse8 .cse9 (* (* c_main_~q~0 c_main_~x~0 c_main_~k~0) 3) (* 3 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))))))) is different from true [2022-03-20 21:03:56,140 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0)) (.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0)) (.cse7 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse8 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (+ (* 2 c_main_~r~0 c_main_~y~0) (* 2 c_main_~p~0 c_main_~x~0) (* (- 2) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 2) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (+ (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0) .cse3 .cse4)))) (= (+ (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0) (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0)))) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))) (not (= (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0)))) (<= (+ (* 3 .cse3) (* 3 .cse4)) (+ .cse5 .cse6 (* .cse7 3) (* 3 .cse8))) (not (= (+ .cse3 .cse4) (+ .cse7 c_main_~c~0 .cse8))))) is different from true [2022-03-20 21:04:24,257 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse6 (* c_main_~q~0 c_main_~x~0)) (.cse7 (* c_main_~s~0 c_main_~y~0)) (.cse5 (+ .cse3 .cse4)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (+ (* 2 c_main_~r~0 c_main_~y~0) (* 2 c_main_~p~0 c_main_~x~0) (* (- 2) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 2) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (+ (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0) .cse3 .cse4)))) (= (+ (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (+ .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0) (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0)))) (not (= .cse5 c_main_~a~0)) (not (= (+ .cse6 .cse7 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse6 .cse7))) (not (= (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0)))) (<= (+ (* 3 .cse3) (* 3 .cse4)) (+ .cse6 .cse7 (* .cse8 3) (* 3 .cse9))) (not (= .cse5 (+ .cse8 c_main_~c~0 .cse9)))))) is different from true [2022-03-20 21:05:03,158 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~q~0_BEFORE_CALL_381 Int) (v_main_~r~0_BEFORE_CALL_334 Int) (v_main_~xy~0_BEFORE_CALL_211 Int) (v_main_~yy~0_BEFORE_CALL_201 Int) (v_main_~y~0_BEFORE_CALL_405 Int) (v_main_~x~0_BEFORE_CALL_399 Int) (v_main_~k~0_BEFORE_CALL_258 Int) (v_main_~s~0_BEFORE_CALL_387 Int) (v_main_~p~0_BEFORE_CALL_314 Int)) (let ((.cse2 (* v_main_~xy~0_BEFORE_CALL_211 v_main_~q~0_BEFORE_CALL_381)) (.cse3 (* v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201)) (.cse6 (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)) (.cse0 (* v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)) (.cse7 (* v_main_~k~0_BEFORE_CALL_258 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (.cse1 (* v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (.cse5 (* v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334)) (.cse4 (* v_main_~p~0_BEFORE_CALL_314 v_main_~x~0_BEFORE_CALL_399))) (or (not (= (+ .cse0 (* (+ .cse0 .cse1) v_main_~y~0_BEFORE_CALL_405) .cse1) (+ .cse2 .cse0 .cse3 .cse1))) (<= (+ (* 3 .cse4) (* .cse5 3)) (+ .cse0 (* .cse6 3) .cse1 (* 3 .cse7))) (let ((.cse8 (div (+ (* v_main_~p~0_BEFORE_CALL_314 2 v_main_~x~0_BEFORE_CALL_399) (* v_main_~y~0_BEFORE_CALL_405 2 v_main_~r~0_BEFORE_CALL_334) (* v_main_~k~0_BEFORE_CALL_258 (- 2) v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) (* v_main_~k~0_BEFORE_CALL_258 (- 2) v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)) (+ .cse5 (* (- 1) v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) .cse4 (* (- 1) v_main_~k~0_BEFORE_CALL_258 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381))))) (= (+ .cse2 (* v_main_~k~0_BEFORE_CALL_258 v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201 .cse8) (* v_main_~p~0_BEFORE_CALL_314 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 .cse8) .cse3 (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334 .cse8) (* v_main_~k~0_BEFORE_CALL_258 v_main_~xy~0_BEFORE_CALL_211 .cse8 v_main_~q~0_BEFORE_CALL_381)) (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387 .cse8) (* v_main_~yy~0_BEFORE_CALL_201 v_main_~r~0_BEFORE_CALL_334 .cse8) (* v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381) (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 .cse8 v_main_~q~0_BEFORE_CALL_381) (* v_main_~p~0_BEFORE_CALL_314 v_main_~xy~0_BEFORE_CALL_211 .cse8) (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387)))) (not (= (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~xy~0_BEFORE_CALL_211 v_main_~q~0_BEFORE_CALL_381) (* v_main_~k~0_BEFORE_CALL_258 v_main_~s~0_BEFORE_CALL_387 v_main_~yy~0_BEFORE_CALL_201) (* v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~r~0_BEFORE_CALL_334) (* v_main_~p~0_BEFORE_CALL_314 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399)) (+ (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~y~0_BEFORE_CALL_405 v_main_~s~0_BEFORE_CALL_387) (* v_main_~p~0_BEFORE_CALL_314 v_main_~xy~0_BEFORE_CALL_211) (* v_main_~yy~0_BEFORE_CALL_201 v_main_~r~0_BEFORE_CALL_334) (* v_main_~k~0_BEFORE_CALL_258 v_main_~y~0_BEFORE_CALL_405 v_main_~x~0_BEFORE_CALL_399 v_main_~q~0_BEFORE_CALL_381)))) (<= (+ .cse6 .cse0 .cse7 .cse1) (+ .cse5 .cse4)))))) is different from true