/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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:57:15,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:57:15,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:57:15,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:57:15,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:57:15,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:57:15,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:57:15,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:57:15,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:57:15,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:57:15,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:57:15,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:57:15,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:57:15,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:57:15,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:57:15,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:57:15,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:57:15,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:57:15,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:57:15,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:57:15,808 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:57:15,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:57:15,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:57:15,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:57:15,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:57:15,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:57:15,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:57:15,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:57:15,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:57:15,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:57:15,838 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:57:15,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:57:15,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:57:15,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:57:15,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:57:15,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:57:15,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:57:15,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:57:15,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:57:15,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:57:15,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:57:15,843 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:57:15,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:57:16,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:57:16,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:57:16,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:57:16,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:57:16,074 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:57:16,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-03-17 19:57:16,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f4551a5/4fecc62c18c645f5a2f4b97d1adeb649/FLAGc2ac95483 [2022-03-17 19:57:16,412 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:57:16,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-03-17 19:57:16,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f4551a5/4fecc62c18c645f5a2f4b97d1adeb649/FLAGc2ac95483 [2022-03-17 19:57:16,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f4551a5/4fecc62c18c645f5a2f4b97d1adeb649 [2022-03-17 19:57:16,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:57:16,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:57:16,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:57:16,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:57:16,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:57:16,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:57:16" (1/1) ... [2022-03-17 19:57:16,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79eb5510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:16, skipping insertion in model container [2022-03-17 19:57:16,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:57:16" (1/1) ... [2022-03-17 19:57:16,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:57:16,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:57:16,992 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-03-17 19:57:17,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:57:17,029 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:57:17,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-03-17 19:57:17,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:57:17,047 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:57:17,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17 WrapperNode [2022-03-17 19:57:17,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:57:17,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:57:17,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:57:17,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:57:17,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:57:17,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:57:17,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:57:17,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:57:17,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:57:17,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:17,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:57:17,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:57:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:57:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:57:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:57:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:57:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:57:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:57:17,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:57:17,180 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:57:17,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:57:17,269 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:57:17,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:57:17,273 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:57:17,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:57:17 BoogieIcfgContainer [2022-03-17 19:57:17,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:57:17,275 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:57:17,275 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:57:17,276 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:57:17,279 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:57:17" (1/1) ... [2022-03-17 19:57:17,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:57:17 BasicIcfg [2022-03-17 19:57:17,292 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:57:17,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:57:17,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:57:17,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:57:17,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:57:16" (1/4) ... [2022-03-17 19:57:17,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce5b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:57:17, skipping insertion in model container [2022-03-17 19:57:17,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:57:17" (2/4) ... [2022-03-17 19:57:17,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce5b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:57:17, skipping insertion in model container [2022-03-17 19:57:17,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:57:17" (3/4) ... [2022-03-17 19:57:17,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce5b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:57:17, skipping insertion in model container [2022-03-17 19:57:17,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:57:17" (4/4) ... [2022-03-17 19:57:17,297 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.cqvasr [2022-03-17 19:57:17,301 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:57:17,301 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:57:17,330 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:57:17,336 INFO L340 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 [2022-03-17 19:57:17,337 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:57:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:57:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:57:17,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:17,361 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:17,362 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:17,365 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-03-17 19:57:17,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:17,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389122810] [2022-03-17 19:57:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:17,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389122810] [2022-03-17 19:57:17,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389122810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:57:17,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:57:17,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:57:17,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631733168] [2022-03-17 19:57:17,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:57:17,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:57:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:57:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:57:17,489 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:17,520 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-17 19:57:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:57:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 19:57:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:17,526 INFO L225 Difference]: With dead ends: 30 [2022-03-17 19:57:17,526 INFO L226 Difference]: Without dead ends: 13 [2022-03-17 19:57:17,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:57:17,531 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:17,531 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:57:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-17 19:57:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-17 19:57:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-17 19:57:17,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-17 19:57:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:17,551 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-17 19:57:17,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-17 19:57:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:57:17,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:17,552 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:17,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:57:17,552 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-03-17 19:57:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199263848] [2022-03-17 19:57:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:17,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199263848] [2022-03-17 19:57:17,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199263848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:57:17,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:57:17,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:57:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328248546] [2022-03-17 19:57:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:57:17,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:57:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:57:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:57:17,673 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:17,717 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-17 19:57:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:57:17,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 19:57:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:17,718 INFO L225 Difference]: With dead ends: 22 [2022-03-17 19:57:17,718 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 19:57:17,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:57:17,720 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:17,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:57:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 19:57:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-17 19:57:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-17 19:57:17,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-17 19:57:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:17,724 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-17 19:57:17,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-17 19:57:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:57:17,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:17,725 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:17,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:57:17,725 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-03-17 19:57:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:17,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357815156] [2022-03-17 19:57:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357815156] [2022-03-17 19:57:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357815156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762047285] [2022-03-17 19:57:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:17,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:17,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:17,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:57:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 19:57:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:57:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:17,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:57:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:18,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762047285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:57:18,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:57:18,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2022-03-17 19:57:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555310400] [2022-03-17 19:57:18,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:57:18,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 19:57:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 19:57:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-17 19:57:18,087 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:18,217 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-03-17 19:57:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:57:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:57:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:18,218 INFO L225 Difference]: With dead ends: 25 [2022-03-17 19:57:18,218 INFO L226 Difference]: Without dead ends: 18 [2022-03-17 19:57:18,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-17 19:57:18,220 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:18,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:57:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-17 19:57:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-17 19:57:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-17 19:57:18,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-17 19:57:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:18,223 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-17 19:57:18,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-17 19:57:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 19:57:18,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:18,224 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:18,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 19:57:18,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:18,425 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1575643231, now seen corresponding path program 1 times [2022-03-17 19:57:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:18,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946090822] [2022-03-17 19:57:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946090822] [2022-03-17 19:57:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946090822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229321279] [2022-03-17 19:57:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:18,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:18,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:57:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 19:57:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:57:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:18,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:57:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:18,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229321279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:57:18,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:57:18,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-03-17 19:57:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660489587] [2022-03-17 19:57:18,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:57:18,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 19:57:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 19:57:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-17 19:57:18,761 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:18,958 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-17 19:57:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 19:57:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-17 19:57:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:18,959 INFO L225 Difference]: With dead ends: 34 [2022-03-17 19:57:18,959 INFO L226 Difference]: Without dead ends: 26 [2022-03-17 19:57:18,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:57:18,960 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:18,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:57:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-17 19:57:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-17 19:57:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-17 19:57:18,964 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 17 [2022-03-17 19:57:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:18,964 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-17 19:57:18,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-17 19:57:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 19:57:18,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:18,965 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:18,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:57:19,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 19:57:19,177 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash 109985751, now seen corresponding path program 2 times [2022-03-17 19:57:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:19,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259383762] [2022-03-17 19:57:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:19,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:19,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259383762] [2022-03-17 19:57:19,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259383762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206738880] [2022-03-17 19:57:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:57:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:19,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:19,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:57:19,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:57:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:57:19,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 19:57:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:57:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:57:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:57:19,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206738880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:57:19,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:57:19,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 23 [2022-03-17 19:57:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595218727] [2022-03-17 19:57:19,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:57:19,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 19:57:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 19:57:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-17 19:57:19,711 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:20,869 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-17 19:57:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 19:57:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-17 19:57:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:20,871 INFO L225 Difference]: With dead ends: 47 [2022-03-17 19:57:20,872 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 19:57:20,872 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 19:57:20,873 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:20,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:57:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 19:57:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-17 19:57:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-17 19:57:20,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2022-03-17 19:57:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:20,879 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-17 19:57:20,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-17 19:57:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 19:57:20,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:20,880 INFO L500 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:20,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 19:57:21,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:21,096 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 134643049, now seen corresponding path program 3 times [2022-03-17 19:57:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:21,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404588298] [2022-03-17 19:57:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 19:57:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404588298] [2022-03-17 19:57:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404588298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124181130] [2022-03-17 19:57:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:57:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:21,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:21,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:57:21,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-17 19:57:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:57:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:57:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:57:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 19:57:21,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:57:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 19:57:22,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124181130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:57:22,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:57:22,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 12] total 27 [2022-03-17 19:57:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919995592] [2022-03-17 19:57:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:57:22,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-17 19:57:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-17 19:57:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-03-17 19:57:22,099 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:26,137 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2022-03-17 19:57:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 19:57:26,138 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-17 19:57:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:26,139 INFO L225 Difference]: With dead ends: 73 [2022-03-17 19:57:26,139 INFO L226 Difference]: Without dead ends: 54 [2022-03-17 19:57:26,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=563, Invalid=2089, Unknown=0, NotChecked=0, Total=2652 [2022-03-17 19:57:26,140 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:26,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 19:57:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-17 19:57:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-17 19:57:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-17 19:57:26,147 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2022-03-17 19:57:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:26,147 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-17 19:57:26,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-17 19:57:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 19:57:26,148 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:26,148 INFO L500 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:26,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 19:57:26,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:26,349 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1228107086, now seen corresponding path program 4 times [2022-03-17 19:57:26,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:26,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876947273] [2022-03-17 19:57:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:26,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 72 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-17 19:57:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876947273] [2022-03-17 19:57:26,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876947273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779325674] [2022-03-17 19:57:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:57:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:26,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:26,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 19:57:26,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:57:26,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:57:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 19:57:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:57:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 19:57:26,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:57:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 19:57:27,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779325674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:57:27,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:57:27,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 19] total 37 [2022-03-17 19:57:27,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096246029] [2022-03-17 19:57:27,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:57:27,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-17 19:57:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:57:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-17 19:57:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=962, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 19:57:27,491 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:57:55,166 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2022-03-17 19:57:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 19:57:55,167 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-17 19:57:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:57:55,168 INFO L225 Difference]: With dead ends: 116 [2022-03-17 19:57:55,168 INFO L226 Difference]: Without dead ends: 86 [2022-03-17 19:57:55,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1061, Invalid=2845, Unknown=0, NotChecked=0, Total=3906 [2022-03-17 19:57:55,169 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:57:55,169 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 99 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 19:57:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-17 19:57:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-17 19:57:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-03-17 19:57:55,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 51 [2022-03-17 19:57:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:57:55,178 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-03-17 19:57:55,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:57:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-03-17 19:57:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-17 19:57:55,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:57:55,179 INFO L500 BasicCegarLoop]: trace histogram [37, 25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:57:55,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 19:57:55,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:55,387 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:57:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:57:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash 525547056, now seen corresponding path program 5 times [2022-03-17 19:57:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:57:55,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565751987] [2022-03-17 19:57:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:57:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:57:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:55,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:57:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:57:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 598 proven. 650 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-17 19:57:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:57:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565751987] [2022-03-17 19:57:55,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565751987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:57:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828931177] [2022-03-17 19:57:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:57:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:57:55,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:57:55,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:57:55,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 19:58:04,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2022-03-17 19:58:04,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:58:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-17 19:58:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:58:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 19:58:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:58:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 19:58:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828931177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:58:07,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:58:07,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34, 35] total 69 [2022-03-17 19:58:07,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948261842] [2022-03-17 19:58:07,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:58:07,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-17 19:58:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:58:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-17 19:58:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=3441, Unknown=0, NotChecked=0, Total=4692 [2022-03-17 19:58:07,285 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:58:43,721 WARN L232 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 230 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:59:07,741 WARN L232 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 223 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:59:38,151 WARN L232 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 216 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:59:40,171 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ 23 c_main_~x~0) 4294967296))) (or (< .cse0 10000000) (not (< .cse0 100000000)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse1 (mod (+ 8 c_main_~x~0) 4294967296))) (or (< .cse1 10000000) (not (< .cse1 100000000)))) (let ((.cse2 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse2 100000000)) (< .cse2 10000000))) (let ((.cse3 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (< .cse3 100000000)) (< .cse3 10000000))) (let ((.cse4 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse4 100000000)) (< .cse4 10000000))) (let ((.cse5 (mod (+ 10 c_main_~x~0) 4294967296))) (or (< .cse5 10000000) (not (< .cse5 100000000)))) (let ((.cse6 (mod (+ 17 c_main_~x~0) 4294967296))) (or (< .cse6 10000000) (not (< .cse6 100000000)))) (let ((.cse7 (mod (+ 16 c_main_~x~0) 4294967296))) (or (< .cse7 10000000) (not (< .cse7 100000000)))) (let ((.cse8 (mod (+ 25 c_main_~x~0) 4294967296))) (or (< .cse8 10000000) (not (< .cse8 100000000)))) (let ((.cse9 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse9 100000000)) (< .cse9 10000000))) (let ((.cse10 (mod (+ 4 c_main_~x~0) 4294967296))) (or (< .cse10 10000000) (not (< .cse10 100000000)))) (let ((.cse11 (mod (+ 13 c_main_~x~0) 4294967296))) (or (< .cse11 10000000) (not (< .cse11 100000000)))) (let ((.cse12 (mod (+ 6 c_main_~x~0) 4294967296))) (or (< .cse12 10000000) (not (< .cse12 100000000)))) (let ((.cse13 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse13 100000000)) (< .cse13 10000000))) (let ((.cse14 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse14 100000000)) (< .cse14 10000000))) (let ((.cse15 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse15 100000000)) (< .cse15 10000000))) (let ((.cse16 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (< .cse16 100000000)) (< .cse16 10000000))) (let ((.cse17 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse17 100000000)) (< .cse17 10000000))) (let ((.cse18 (mod (+ 12 c_main_~x~0) 4294967296))) (or (< .cse18 10000000) (not (< .cse18 100000000)))) (let ((.cse19 (mod (+ 28 c_main_~x~0) 4294967296))) (or (< .cse19 10000000) (not (< .cse19 100000000)))) (let ((.cse20 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse20 100000000)) (< .cse20 10000000))) (let ((.cse21 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (< .cse21 100000000)) (< .cse21 10000000))) (let ((.cse22 (mod (+ 2 c_main_~x~0) 4294967296))) (or (< .cse22 10000000) (not (< .cse22 100000000)))) (let ((.cse23 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (< .cse23 100000000)) (< .cse23 10000000))) (let ((.cse24 (mod (+ 30 c_main_~x~0) 4294967296))) (or (< .cse24 10000000) (not (< .cse24 100000000)))) (let ((.cse25 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (< .cse25 100000000)) (< .cse25 10000000))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod c_main_~x~0 4294967296) 10000000) (let ((.cse26 (mod (+ c_main_~x~0 27) 4294967296))) (or (< .cse26 10000000) (not (< .cse26 100000000)))) (let ((.cse27 (mod (+ 19 c_main_~x~0) 4294967296))) (or (< .cse27 10000000) (not (< .cse27 100000000))))) is different from false [2022-03-17 20:00:12,911 WARN L232 SmtUtils]: Spent 9.06s on a formula simplification. DAG size of input: 203 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:00:43,866 WARN L232 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 202 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:01:21,305 WARN L232 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 195 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:03:27,874 WARN L232 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 167 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:08:41,946 WARN L232 SmtUtils]: Spent 41.73s on a formula simplification. DAG size of input: 233 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:08:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:08:42,007 INFO L93 Difference]: Finished difference Result 182 states and 229 transitions. [2022-03-17 20:08:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-17 20:08:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-17 20:08:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:08:42,009 INFO L225 Difference]: With dead ends: 182 [2022-03-17 20:08:42,009 INFO L226 Difference]: Without dead ends: 152 [2022-03-17 20:08:42,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 635.7s TimeCoverageRelationStatistics Valid=4276, Invalid=11960, Unknown=24, NotChecked=252, Total=16512 [2022-03-17 20:08:42,012 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:08:42,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 184 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1957 Invalid, 0 Unknown, 1 Unchecked, 1.2s Time] [2022-03-17 20:08:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-17 20:08:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-17 20:08:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.054421768707483) internal successors, (155), 147 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:08:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2022-03-17 20:08:42,025 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 85 [2022-03-17 20:08:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:08:42,025 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2022-03-17 20:08:42,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:08:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2022-03-17 20:08:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-17 20:08:42,027 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:08:42,027 INFO L500 BasicCegarLoop]: trace histogram [70, 58, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:08:42,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:08:42,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:08:42,230 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:08:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:08:42,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1736138738, now seen corresponding path program 6 times [2022-03-17 20:08:42,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:08:42,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934190920] [2022-03-17 20:08:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:08:42,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:08:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:08:43,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:08:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:08:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1357 proven. 3422 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-17 20:08:43,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:08:43,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934190920] [2022-03-17 20:08:43,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934190920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:08:43,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954588055] [2022-03-17 20:08:43,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 20:08:43,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:08:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:08:43,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:08:43,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:09:05,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2022-03-17 20:09:05,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:09:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 20:09:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:09:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2022 proven. 984 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2022-03-17 20:09:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:09:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1450 proven. 144 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2022-03-17 20:09:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954588055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:09:11,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:09:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 28, 19] total 105 [2022-03-17 20:09:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034308443] [2022-03-17 20:09:11,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:09:11,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-17 20:09:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:09:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-17 20:09:11,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2717, Invalid=8203, Unknown=0, NotChecked=0, Total=10920 [2022-03-17 20:09:11,165 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)