/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/ps5-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 04:53:54,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 04:53:54,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 04:53:54,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 04:53:54,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 04:53:54,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 04:53:54,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 04:53:54,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 04:53:54,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 04:53:54,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 04:53:54,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 04:53:54,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 04:53:54,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 04:53:54,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 04:53:54,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 04:53:54,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 04:53:54,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 04:53:54,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 04:53:54,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 04:53:54,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 04:53:54,458 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 04:53:54,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 04:53:54,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 04:53:54,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 04:53:54,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 04:53:54,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 04:53:54,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 04:53:54,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 04:53:54,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 04:53:54,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 04:53:54,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 04:53:54,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 04:53:54,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 04:53:54,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 04:53:54,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 04:53:54,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 04:53:54,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 04:53:54,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 04:53:54,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 04:53:54,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 04:53:54,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 04:53:54,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 04:53:54,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 04:53:54,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 04:53:54,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 04:53:54,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 04:53:54,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 04:53:54,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 04:53:54,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 04:53:54,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 04:53:54,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 04:53:54,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 04:53:54,487 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 04:53:54,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 04:53:54,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 04:53:54,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 04:53:54,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:53:54,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 04:53:54,488 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 04:53:54,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 04:53:54,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 04:53:54,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 04:53:54,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 04:53:54,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 04:53:54,678 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 04:53:54,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2022-03-18 04:53:54,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbfd265ca/cd4159c0651945f8bfafe849a8341c3d/FLAGd131f7639 [2022-03-18 04:53:55,088 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 04:53:55,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2022-03-18 04:53:55,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbfd265ca/cd4159c0651945f8bfafe849a8341c3d/FLAGd131f7639 [2022-03-18 04:53:55,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbfd265ca/cd4159c0651945f8bfafe849a8341c3d [2022-03-18 04:53:55,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 04:53:55,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 04:53:55,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 04:53:55,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 04:53:55,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 04:53:55,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfcb734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55, skipping insertion in model container [2022-03-18 04:53:55,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 04:53:55,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 04:53:55,626 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/ps5-ll_valuebound10.c[458,471] [2022-03-18 04:53:55,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:53:55,655 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 04:53:55,663 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/ps5-ll_valuebound10.c[458,471] [2022-03-18 04:53:55,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:53:55,675 INFO L208 MainTranslator]: Completed translation [2022-03-18 04:53:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55 WrapperNode [2022-03-18 04:53:55,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 04:53:55,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 04:53:55,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 04:53:55,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 04:53:55,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 04:53:55,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 04:53:55,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 04:53:55,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 04:53:55,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (1/1) ... [2022-03-18 04:53:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:53:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:53:55,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 04:53:55,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 04:53:55,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 04:53:55,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 04:53:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 04:53:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 04:53:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 04:53:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 04:53:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 04:53:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 04:53:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 04:53:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 04:53:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-18 04:53:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 04:53:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 04:53:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 04:53:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 04:53:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 04:53:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 04:53:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 04:53:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 04:53:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 04:53:55,791 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 04:53:55,793 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 04:53:55,910 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 04:53:55,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 04:53:55,934 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 04:53:55,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:53:55 BoogieIcfgContainer [2022-03-18 04:53:55,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 04:53:55,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 04:53:55,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 04:53:55,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 04:53:55,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:53:55" (1/3) ... [2022-03-18 04:53:55,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a68988e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:53:55, skipping insertion in model container [2022-03-18 04:53:55,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:53:55" (2/3) ... [2022-03-18 04:53:55,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a68988e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:53:55, skipping insertion in model container [2022-03-18 04:53:55,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:53:55" (3/3) ... [2022-03-18 04:53:55,941 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound10.c [2022-03-18 04:53:55,944 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 04:53:55,944 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 04:53:56,000 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 04:53:56,004 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 [2022-03-18 04:53:56,004 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 04:53:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:53:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 04:53:56,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:53:56,032 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:53:56,033 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:53:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:53:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-03-18 04:53:56,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:56,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197177013] [2022-03-18 04:53:56,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:53:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 2 times [2022-03-18 04:53:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:53:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884310826] [2022-03-18 04:53:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:53:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:53:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:53:56,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 04:53:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:53:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 04:53:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:53:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 04:53:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:53:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:53:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:53:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884310826] [2022-03-18 04:53:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884310826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:53:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:53:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:53:56,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:53:56,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197177013] [2022-03-18 04:53:56,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197177013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:53:56,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:53:56,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:53:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544680680] [2022-03-18 04:53:56,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:53:56,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 04:53:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 04:53:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:53:56,243 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 04:53:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:53:56,308 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-03-18 04:53:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 04:53:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 04:53:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:53:56,314 INFO L225 Difference]: With dead ends: 51 [2022-03-18 04:53:56,314 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 04:53:56,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:53:56,318 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:53:56,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:53:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 04:53:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 04:53:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 04:53:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-18 04:53:56,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-18 04:53:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:53:56,343 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-18 04:53:56,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 04:53:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-18 04:53:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 04:53:56,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:53:56,344 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:53:56,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 04:53:56,344 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:53:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:53:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-03-18 04:53:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:56,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256230348] [2022-03-18 04:53:56,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:53:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 2 times [2022-03-18 04:53:56,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:53:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086300982] [2022-03-18 04:53:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:53:56,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:53:56,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:53:56,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713813500] [2022-03-18 04:53:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:53:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:53:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:53:56,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:53:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 04:53:56,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 04:53:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:53:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 04:53:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:53:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:53:56,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:53:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:53:56,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086300982] [2022-03-18 04:53:56,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:53:56,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713813500] [2022-03-18 04:53:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713813500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:53:56,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:53:56,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:53:56,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:53:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256230348] [2022-03-18 04:53:56,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256230348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:53:56,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:53:56,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:53:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514192508] [2022-03-18 04:53:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:53:56,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:53:56,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:53:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 04:53:56,582 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 04:53:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:53:56,630 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-18 04:53:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 04:53:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 04:53:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:53:56,632 INFO L225 Difference]: With dead ends: 35 [2022-03-18 04:53:56,632 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 04:53:56,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 04:53:56,634 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:53:56,637 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:53:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 04:53:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 04:53:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:53:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 04:53:56,652 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-18 04:53:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:53:56,652 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 04:53:56,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 04:53:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 04:53:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 04:53:56,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:53:56,653 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:53:56,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 04:53:56,882 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 [2022-03-18 04:53:56,882 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:53:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:53:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-03-18 04:53:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:56,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122205105] [2022-03-18 04:53:56,886 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:53:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 2 times [2022-03-18 04:53:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:53:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117265981] [2022-03-18 04:53:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:53:56,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:53:56,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:53:56,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312612004] [2022-03-18 04:53:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:53:56,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:53:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:53:56,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:53:56,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 04:53:57,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:53:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:53:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 04:53:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:53:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:53:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:53:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:53:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:53:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117265981] [2022-03-18 04:53:59,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:53:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312612004] [2022-03-18 04:53:59,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312612004] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 04:53:59,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:53:59,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 04:53:59,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:53:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122205105] [2022-03-18 04:53:59,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122205105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:53:59,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:53:59,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:53:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209110676] [2022-03-18 04:53:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:53:59,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:53:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:53:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-03-18 04:53:59,554 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:53:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:53:59,612 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-18 04:53:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 04:53:59,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-18 04:53:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:53:59,613 INFO L225 Difference]: With dead ends: 37 [2022-03-18 04:53:59,613 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 04:53:59,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-03-18 04:53:59,614 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:53:59,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:53:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 04:53:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 04:53:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:53:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 04:53:59,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-18 04:53:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:53:59,620 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 04:53:59,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:53:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 04:53:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 04:53:59,621 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:53:59,621 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:53:59,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 04:53:59,821 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 [2022-03-18 04:53:59,822 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:53:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:53:59,822 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-03-18 04:53:59,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:53:59,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974432528] [2022-03-18 04:53:59,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:53:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 2 times [2022-03-18 04:53:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:53:59,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310719695] [2022-03-18 04:53:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:53:59,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:53:59,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:53:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492957366] [2022-03-18 04:53:59,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:53:59,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:53:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:53:59,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:53:59,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 04:53:59,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:53:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:53:59,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 04:53:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 04:54:00,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:00,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310719695] [2022-03-18 04:54:00,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492957366] [2022-03-18 04:54:00,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492957366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:00,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:00,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 04:54:00,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974432528] [2022-03-18 04:54:00,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974432528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:00,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:00,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 04:54:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571641286] [2022-03-18 04:54:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:00,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 04:54:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 04:54:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 04:54:00,194 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:54:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:00,250 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-18 04:54:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 04:54:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-18 04:54:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:00,253 INFO L225 Difference]: With dead ends: 42 [2022-03-18 04:54:00,253 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 04:54:00,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:54:00,256 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:00,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:54:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 04:54:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 04:54:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:54:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-18 04:54:00,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-18 04:54:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:00,271 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-18 04:54:00,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:54:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-18 04:54:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 04:54:00,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:00,273 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:00,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:00,489 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 [2022-03-18 04:54:00,489 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 3 times [2022-03-18 04:54:00,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:00,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636354474] [2022-03-18 04:54:00,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 4 times [2022-03-18 04:54:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084470689] [2022-03-18 04:54:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:00,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:00,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474480255] [2022-03-18 04:54:00,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:54:00,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:00,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:00,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:00,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 04:54:00,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:54:00,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 04:54:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 04:54:00,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:00,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084470689] [2022-03-18 04:54:00,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474480255] [2022-03-18 04:54:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474480255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:00,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-18 04:54:00,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636354474] [2022-03-18 04:54:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636354474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:00,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:00,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 04:54:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222079992] [2022-03-18 04:54:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:00,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 04:54:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 04:54:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:54:00,859 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 04:54:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:00,913 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-03-18 04:54:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 04:54:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-18 04:54:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:00,914 INFO L225 Difference]: With dead ends: 45 [2022-03-18 04:54:00,914 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 04:54:00,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-18 04:54:00,915 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:00,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:54:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 04:54:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 04:54:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:54:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-18 04:54:00,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-18 04:54:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:00,921 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-18 04:54:00,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 04:54:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-18 04:54:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 04:54:00,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:00,922 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:00,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:01,138 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 [2022-03-18 04:54:01,139 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 5 times [2022-03-18 04:54:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529424804] [2022-03-18 04:54:01,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 6 times [2022-03-18 04:54:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918834578] [2022-03-18 04:54:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:01,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372675623] [2022-03-18 04:54:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:54:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:01,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:01,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 04:54:01,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 04:54:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:01,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 04:54:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 04:54:01,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918834578] [2022-03-18 04:54:01,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372675623] [2022-03-18 04:54:01,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372675623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:01,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:01,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 04:54:01,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529424804] [2022-03-18 04:54:01,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529424804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:01,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:01,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 04:54:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287877131] [2022-03-18 04:54:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:01,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 04:54:01,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 04:54:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:54:01,763 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 04:54:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:01,836 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-18 04:54:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 04:54:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-18 04:54:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:01,837 INFO L225 Difference]: With dead ends: 48 [2022-03-18 04:54:01,837 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 04:54:01,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 04:54:01,838 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:01,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 04:54:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-18 04:54:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 04:54:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 04:54:01,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-18 04:54:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:01,844 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 04:54:01,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 04:54:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 04:54:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 04:54:01,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:01,845 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:01,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:02,050 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 [2022-03-18 04:54:02,050 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 7 times [2022-03-18 04:54:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223864537] [2022-03-18 04:54:02,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 8 times [2022-03-18 04:54:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82091417] [2022-03-18 04:54:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:02,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615316950] [2022-03-18 04:54:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:54:02,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:02,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:02,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:02,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 04:54:02,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:54:02,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:02,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 04:54:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 04:54:03,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82091417] [2022-03-18 04:54:03,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615316950] [2022-03-18 04:54:03,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615316950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:03,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:03,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 04:54:03,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223864537] [2022-03-18 04:54:03,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223864537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:03,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:03,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 04:54:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663055300] [2022-03-18 04:54:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:03,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 04:54:03,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:03,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 04:54:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 04:54:03,193 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 04:54:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:03,301 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-18 04:54:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 04:54:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-18 04:54:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:03,302 INFO L225 Difference]: With dead ends: 51 [2022-03-18 04:54:03,302 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 04:54:03,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-18 04:54:03,303 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:03,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 04:54:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 04:54:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 04:54:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-18 04:54:03,310 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-18 04:54:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:03,310 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-18 04:54:03,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 04:54:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-18 04:54:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 04:54:03,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:03,311 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:03,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 04:54:03,516 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 [2022-03-18 04:54:03,516 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 9 times [2022-03-18 04:54:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:03,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467086364] [2022-03-18 04:54:03,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 10 times [2022-03-18 04:54:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:03,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749038042] [2022-03-18 04:54:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:03,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:03,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109065149] [2022-03-18 04:54:03,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:54:03,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:03,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:03,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:03,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 04:54:03,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:54:03,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 04:54:03,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 04:54:03,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:03,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749038042] [2022-03-18 04:54:03,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:03,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109065149] [2022-03-18 04:54:03,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109065149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:03,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:03,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 04:54:03,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:03,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467086364] [2022-03-18 04:54:03,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467086364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:03,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:03,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 04:54:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031286206] [2022-03-18 04:54:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:03,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 04:54:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 04:54:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 04:54:03,905 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 04:54:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:04,015 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-18 04:54:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 04:54:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-18 04:54:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:04,016 INFO L225 Difference]: With dead ends: 54 [2022-03-18 04:54:04,016 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 04:54:04,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 04:54:04,017 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:04,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 04:54:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 04:54:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 04:54:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-18 04:54:04,023 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-18 04:54:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:04,024 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-18 04:54:04,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 04:54:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-18 04:54:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 04:54:04,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:04,025 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:04,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:04,235 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 [2022-03-18 04:54:04,235 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 11 times [2022-03-18 04:54:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794776254] [2022-03-18 04:54:04,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 12 times [2022-03-18 04:54:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520098271] [2022-03-18 04:54:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:04,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:04,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744486198] [2022-03-18 04:54:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:54:04,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:04,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:04,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:04,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 04:54:06,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 04:54:06,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 04:54:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 04:54:06,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520098271] [2022-03-18 04:54:06,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744486198] [2022-03-18 04:54:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744486198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:06,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 04:54:06,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:06,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794776254] [2022-03-18 04:54:06,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794776254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:06,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:06,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 04:54:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741825990] [2022-03-18 04:54:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:06,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 04:54:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 04:54:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 04:54:06,769 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 04:54:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:06,901 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-18 04:54:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 04:54:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-18 04:54:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:06,902 INFO L225 Difference]: With dead ends: 57 [2022-03-18 04:54:06,903 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 04:54:06,905 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-18 04:54:06,905 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:06,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 04:54:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 04:54:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 04:54:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-18 04:54:06,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-18 04:54:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:06,913 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-18 04:54:06,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 04:54:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-18 04:54:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 04:54:06,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:06,914 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:06,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:07,120 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 [2022-03-18 04:54:07,120 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 13 times [2022-03-18 04:54:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051169328] [2022-03-18 04:54:07,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 14 times [2022-03-18 04:54:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:07,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262320247] [2022-03-18 04:54:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:07,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:07,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264188365] [2022-03-18 04:54:07,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:54:07,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:07,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:07,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:07,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 04:54:14,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:54:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 04:54:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 04:54:15,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:15,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262320247] [2022-03-18 04:54:15,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264188365] [2022-03-18 04:54:15,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264188365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:15,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-18 04:54:15,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051169328] [2022-03-18 04:54:15,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051169328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:15,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 04:54:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236639402] [2022-03-18 04:54:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:15,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 04:54:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 04:54:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-18 04:54:15,159 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-18 04:54:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:15,290 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-18 04:54:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 04:54:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-18 04:54:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:15,291 INFO L225 Difference]: With dead ends: 60 [2022-03-18 04:54:15,291 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 04:54:15,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-18 04:54:15,292 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:15,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 04:54:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 04:54:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 04:54:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-18 04:54:15,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-18 04:54:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:15,299 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-18 04:54:15,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-18 04:54:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-18 04:54:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 04:54:15,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:15,300 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:15,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 04:54:15,504 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 [2022-03-18 04:54:15,504 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 15 times [2022-03-18 04:54:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:15,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788611816] [2022-03-18 04:54:15,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 16 times [2022-03-18 04:54:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:15,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245500123] [2022-03-18 04:54:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:15,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:15,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383978106] [2022-03-18 04:54:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:54:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:15,512 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:15,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 04:54:15,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:54:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:54:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 04:54:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:54:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 04:54:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:54:15,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:54:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245500123] [2022-03-18 04:54:15,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:54:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383978106] [2022-03-18 04:54:15,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383978106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:54:15,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:54:15,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 04:54:15,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:54:15,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788611816] [2022-03-18 04:54:15,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788611816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:54:15,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:54:15,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 04:54:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788235477] [2022-03-18 04:54:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:54:15,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 04:54:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 04:54:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-18 04:54:15,941 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-18 04:54:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:54:16,103 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-18 04:54:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 04:54:16,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-18 04:54:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:54:16,104 INFO L225 Difference]: With dead ends: 63 [2022-03-18 04:54:16,104 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 04:54:16,104 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-18 04:54:16,105 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:54:16,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:54:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 04:54:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 04:54:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 04:54:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-18 04:54:16,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-18 04:54:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:54:16,112 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-18 04:54:16,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-18 04:54:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-18 04:54:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 04:54:16,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:54:16,113 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:54:16,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 04:54:16,346 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 [2022-03-18 04:54:16,346 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:54:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:54:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 17 times [2022-03-18 04:54:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:54:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630324994] [2022-03-18 04:54:16,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:54:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 18 times [2022-03-18 04:54:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:54:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993202425] [2022-03-18 04:54:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:54:16,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:54:16,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:54:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322260159] [2022-03-18 04:54:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:54:16,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:54:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:54:16,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:54:16,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process