/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 23:07:21,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 23:07:21,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 23:07:21,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 23:07:21,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 23:07:21,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 23:07:21,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 23:07:21,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 23:07:21,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 23:07:21,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 23:07:21,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 23:07:21,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 23:07:21,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 23:07:21,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 23:07:21,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 23:07:21,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 23:07:21,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 23:07:21,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 23:07:21,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 23:07:21,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 23:07:21,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 23:07:21,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 23:07:21,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 23:07:21,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 23:07:21,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 23:07:21,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 23:07:21,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 23:07:21,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 23:07:21,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 23:07:21,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 23:07:21,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 23:07:21,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 23:07:21,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 23:07:21,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 23:07:21,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 23:07:21,800 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 23:07:21,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 23:07:21,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 23:07:21,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 23:07:21,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 23:07:21,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:07:21,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 23:07:21,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 23:07:21,803 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 23:07:21,803 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 23:07:21,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 23:07:22,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 23:07:22,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 23:07:22,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 23:07:22,003 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 23:07:22,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-02-23 23:07:22,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be06cbfa2/30ffb3080f174969afee0f625d253e81/FLAGb8d2f7a54 [2022-02-23 23:07:22,402 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 23:07:22,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-02-23 23:07:22,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be06cbfa2/30ffb3080f174969afee0f625d253e81/FLAGb8d2f7a54 [2022-02-23 23:07:22,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be06cbfa2/30ffb3080f174969afee0f625d253e81 [2022-02-23 23:07:22,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 23:07:22,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 23:07:22,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 23:07:22,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 23:07:22,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 23:07:22,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4f8906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22, skipping insertion in model container [2022-02-23 23:07:22,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 23:07:22,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 23:07:22,600 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/hard-u_unwindbound100.c[537,550] [2022-02-23 23:07:22,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:07:22,628 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 23:07:22,637 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/hard-u_unwindbound100.c[537,550] [2022-02-23 23:07:22,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:07:22,655 INFO L208 MainTranslator]: Completed translation [2022-02-23 23:07:22,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22 WrapperNode [2022-02-23 23:07:22,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 23:07:22,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 23:07:22,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 23:07:22,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 23:07:22,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 23:07:22,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 23:07:22,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 23:07:22,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 23:07:22,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:07:22,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:22,709 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) [2022-02-23 23:07:22,731 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 [2022-02-23 23:07:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 23:07:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 23:07:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 23:07:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 23:07:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 23:07:22,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 23:07:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 23:07:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 23:07:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 23:07:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 23:07:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 23:07:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 23:07:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 23:07:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 23:07:22,787 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 23:07:22,788 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 23:07:22,925 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 23:07:22,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 23:07:22,929 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 23:07:22,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:07:22 BoogieIcfgContainer [2022-02-23 23:07:22,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 23:07:22,931 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 23:07:22,931 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 23:07:22,940 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 23:07:22,942 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:07:22" (1/1) ... [2022-02-23 23:07:22,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:07:22 BasicIcfg [2022-02-23 23:07:22,955 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 23:07:22,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 23:07:22,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 23:07:22,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 23:07:22,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:07:22" (1/4) ... [2022-02-23 23:07:22,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10685d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:07:22, skipping insertion in model container [2022-02-23 23:07:22,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:07:22" (2/4) ... [2022-02-23 23:07:22,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10685d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:07:22, skipping insertion in model container [2022-02-23 23:07:22,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:07:22" (3/4) ... [2022-02-23 23:07:22,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10685d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:07:22, skipping insertion in model container [2022-02-23 23:07:22,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:07:22" (4/4) ... [2022-02-23 23:07:22,967 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cqvasr [2022-02-23 23:07:22,970 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 23:07:22,971 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 23:07:23,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 23:07:23,018 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 23:07:23,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 23:07:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 23:07:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:07:23,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:23,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:23,038 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-02-23 23:07:23,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:23,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902484267] [2022-02-23 23:07:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:23,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:07:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:07:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:07:23,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:23,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902484267] [2022-02-23 23:07:23,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902484267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:23,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:23,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 23:07:23,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809498380] [2022-02-23 23:07:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:23,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 23:07:23,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 23:07:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:07:23,242 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:07:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:23,340 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-02-23 23:07:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 23:07:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 23:07:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:23,347 INFO L225 Difference]: With dead ends: 66 [2022-02-23 23:07:23,347 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 23:07:23,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:07:23,353 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:23,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:07:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 23:07:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-23 23:07:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:07:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-23 23:07:23,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-23 23:07:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-23 23:07:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:07:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-23 23:07:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:07:23,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:23,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:23,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 23:07:23,390 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-02-23 23:07:23,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:23,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697056266] [2022-02-23 23:07:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:07:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:07:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:07:23,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:23,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697056266] [2022-02-23 23:07:23,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697056266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:23,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:23,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:07:23,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712133297] [2022-02-23 23:07:23,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:07:23,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:07:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:07:23,500 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:07:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:23,655 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-23 23:07:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:07:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 23:07:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:23,657 INFO L225 Difference]: With dead ends: 47 [2022-02-23 23:07:23,657 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 23:07:23,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:07:23,658 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:23,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:07:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 23:07:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-23 23:07:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:07:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-23 23:07:23,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-23 23:07:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:23,666 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-23 23:07:23,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:07:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-23 23:07:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 23:07:23,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:23,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:23,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 23:07:23,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-02-23 23:07:23,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:23,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088879727] [2022-02-23 23:07:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:23,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:23,679 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:23,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85831037] [2022-02-23 23:07:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:23,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:23,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:23,681 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) [2022-02-23 23:07:23,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 23:07:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 23:07:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:07:23,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:07:23,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:23,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088879727] [2022-02-23 23:07:23,781 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:23,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85831037] [2022-02-23 23:07:23,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85831037] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:23,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:23,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 23:07:23,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308291618] [2022-02-23 23:07:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:23,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 23:07:23,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 23:07:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:07:23,783 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:07:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:23,792 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-23 23:07:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 23:07:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-23 23:07:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:23,793 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:07:23,793 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 23:07:23,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:07:23,794 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:23,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:07:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 23:07:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-23 23:07:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:07:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-23 23:07:23,799 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-23 23:07:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:23,799 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-23 23:07:23,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:07:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-23 23:07:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 23:07:23,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:23,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:23,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 23:07:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:24,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-02-23 23:07:24,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:24,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657302364] [2022-02-23 23:07:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:24,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:07:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:07:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-23 23:07:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:07:24,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:24,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657302364] [2022-02-23 23:07:24,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657302364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:24,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:24,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:07:24,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197842569] [2022-02-23 23:07:24,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:24,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:07:24,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:07:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:07:24,089 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:07:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:24,233 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 23:07:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:07:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 23:07:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:24,236 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:07:24,236 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 23:07:24,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:07:24,245 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:24,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:07:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 23:07:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-23 23:07:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:07:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-23 23:07:24,254 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-23 23:07:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:24,254 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-23 23:07:24,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:07:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-23 23:07:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 23:07:24,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:24,255 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 23:07:24,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-02-23 23:07:24,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:24,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981611822] [2022-02-23 23:07:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:24,269 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:24,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196165074] [2022-02-23 23:07:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:24,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:24,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:24,281 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) [2022-02-23 23:07:24,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 23:07:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:07:24,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 23:07:24,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:07:24,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:24,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981611822] [2022-02-23 23:07:24,388 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:24,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196165074] [2022-02-23 23:07:24,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196165074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:24,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:24,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:07:24,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619565072] [2022-02-23 23:07:24,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:24,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:07:24,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:07:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:07:24,389 INFO L87 Difference]: Start difference. First operand 42 states and 50 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) [2022-02-23 23:07:26,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 23:07:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:26,590 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-02-23 23:07:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:07:26,591 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 28 [2022-02-23 23:07:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:26,591 INFO L225 Difference]: With dead ends: 59 [2022-02-23 23:07:26,591 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 23:07:26,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:07:26,592 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:26,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-23 23:07:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 23:07:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-23 23:07:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:07:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-02-23 23:07:26,599 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-02-23 23:07:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:26,599 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-02-23 23:07:26,599 INFO L471 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) [2022-02-23 23:07:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-02-23 23:07:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:07:26,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:26,600 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:26,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 23:07:26,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:26,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-02-23 23:07:26,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:26,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727714348] [2022-02-23 23:07:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:26,809 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:26,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114713826] [2022-02-23 23:07:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:26,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:26,810 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) [2022-02-23 23:07:26,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 23:07:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:07:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:07:26,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:07:26,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:26,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727714348] [2022-02-23 23:07:26,931 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:26,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114713826] [2022-02-23 23:07:26,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114713826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:26,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:26,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:07:26,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698263683] [2022-02-23 23:07:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:07:26,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:07:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:07:26,932 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:07:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:26,974 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-02-23 23:07:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:07:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-23 23:07:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:26,977 INFO L225 Difference]: With dead ends: 76 [2022-02-23 23:07:26,977 INFO L226 Difference]: Without dead ends: 69 [2022-02-23 23:07:26,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:07:26,978 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:26,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:07:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-23 23:07:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-23 23:07:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:07:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-02-23 23:07:26,994 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-02-23 23:07:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:26,994 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-02-23 23:07:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:07:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-02-23 23:07:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:07:26,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:26,995 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:27,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 23:07:27,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:27,196 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-02-23 23:07:27,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:27,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563102277] [2022-02-23 23:07:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:27,204 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:27,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930272701] [2022-02-23 23:07:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:27,205 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) [2022-02-23 23:07:27,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 23:07:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 23:07:27,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:07:27,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:07:27,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:27,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563102277] [2022-02-23 23:07:27,463 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:27,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930272701] [2022-02-23 23:07:27,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930272701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:07:27,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:07:27,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:07:27,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470548898] [2022-02-23 23:07:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:27,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:07:27,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:07:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:07:27,464 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:07:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:27,660 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-02-23 23:07:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 23:07:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 23:07:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:27,662 INFO L225 Difference]: With dead ends: 82 [2022-02-23 23:07:27,662 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 23:07:27,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:07:27,663 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:27,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 23:07:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 23:07:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-23 23:07:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 23:07:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-02-23 23:07:27,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-02-23 23:07:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-02-23 23:07:27,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:07:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-02-23 23:07:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 23:07:27,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:27,670 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:27,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 23:07:27,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:27,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-02-23 23:07:27,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:27,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051849906] [2022-02-23 23:07:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:27,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:27,895 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:27,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146585002] [2022-02-23 23:07:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:27,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:27,898 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) [2022-02-23 23:07:27,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 23:07:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:07:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:07:28,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:07:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:07:28,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:28,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051849906] [2022-02-23 23:07:28,103 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:28,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146585002] [2022-02-23 23:07:28,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146585002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:07:28,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:07:28,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 23:07:28,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673140767] [2022-02-23 23:07:28,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:07:28,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:07:28,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:07:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:07:28,104 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:07:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:28,223 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-02-23 23:07:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:07:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-23 23:07:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:28,226 INFO L225 Difference]: With dead ends: 160 [2022-02-23 23:07:28,226 INFO L226 Difference]: Without dead ends: 146 [2022-02-23 23:07:28,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:07:28,244 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:28,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:07:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-23 23:07:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-02-23 23:07:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 23:07:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-02-23 23:07:28,255 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-02-23 23:07:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-02-23 23:07:28,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:07:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-02-23 23:07:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 23:07:28,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:28,256 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:28,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 23:07:28,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:28,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-02-23 23:07:28,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:28,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223091442] [2022-02-23 23:07:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:28,492 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:28,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227314487] [2022-02-23 23:07:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:28,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:28,493 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) [2022-02-23 23:07:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 23:07:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 23:07:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:07:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:07:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:07:29,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:29,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223091442] [2022-02-23 23:07:29,079 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:29,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227314487] [2022-02-23 23:07:29,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227314487] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 23:07:29,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:07:29,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 23:07:29,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780932854] [2022-02-23 23:07:29,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:07:29,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:07:29,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:07:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:07:29,081 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 23:07:31,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:07:33,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:07:35,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:07:37,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:07:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:37,792 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-02-23 23:07:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:07:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-02-23 23:07:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:37,794 INFO L225 Difference]: With dead ends: 162 [2022-02-23 23:07:37,794 INFO L226 Difference]: Without dead ends: 160 [2022-02-23 23:07:37,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 23:07:37,795 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:37,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-02-23 23:07:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-23 23:07:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-02-23 23:07:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 23:07:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-02-23 23:07:37,807 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-02-23 23:07:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:37,808 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-02-23 23:07:37,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 23:07:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-02-23 23:07:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 23:07:37,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:37,809 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:37,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 23:07:38,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:38,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-02-23 23:07:38,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:38,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627846140] [2022-02-23 23:07:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:38,023 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:38,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310116834] [2022-02-23 23:07:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:38,025 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) [2022-02-23 23:07:38,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 23:07:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:07:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:07:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:07:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 23:07:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:07:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:07:38,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:07:38,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627846140] [2022-02-23 23:07:38,291 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:07:38,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310116834] [2022-02-23 23:07:38,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310116834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:07:38,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:07:38,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 23:07:38,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997713015] [2022-02-23 23:07:38,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:07:38,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 23:07:38,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:07:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 23:07:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:07:38,292 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 23:07:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:07:38,494 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-02-23 23:07:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 23:07:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-23 23:07:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:07:38,497 INFO L225 Difference]: With dead ends: 281 [2022-02-23 23:07:38,497 INFO L226 Difference]: Without dead ends: 257 [2022-02-23 23:07:38,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:07:38,498 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:07:38,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 23:07:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-23 23:07:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-02-23 23:07:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 23:07:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-02-23 23:07:38,516 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-02-23 23:07:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:07:38,516 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-02-23 23:07:38,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 23:07:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-02-23 23:07:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 23:07:38,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:07:38,522 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:07:38,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 23:07:38,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:38,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:07:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:07:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-02-23 23:07:38,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:07:38,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071269036] [2022-02-23 23:07:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:07:38,731 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:07:38,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644470878] [2022-02-23 23:07:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:07:38,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:07:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:07:38,732 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) [2022-02-23 23:07:38,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process