/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:22:32,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:22:32,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:22:32,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 02:22:32,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:22:32,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:22:32,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:22:32,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:22:32,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:22:32,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:22:32,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:22:32,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:22:32,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:22:32,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:22:32,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:22:32,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:22:32,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 02:22:32,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:22:32,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:22:32,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:22:32,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:22:32,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:22:32,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:22:32,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:22:32,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:22:32,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:22:32,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:22:32,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:22:32,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:22:32,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:22:32,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:22:32,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:22:32,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:22:32,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:22:32,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:22:32,804 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:22:32,804 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:22:32,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:22:32,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:22:32,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:22:32,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:22:32,976 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:22:32,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2022-01-11 02:22:33,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98fa4342/5ce2cbdd5001484d8853f5da041ddf12/FLAG5bfccd7f4 [2022-01-11 02:22:33,395 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:22:33,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2022-01-11 02:22:33,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98fa4342/5ce2cbdd5001484d8853f5da041ddf12/FLAG5bfccd7f4 [2022-01-11 02:22:33,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98fa4342/5ce2cbdd5001484d8853f5da041ddf12 [2022-01-11 02:22:33,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:22:33,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:22:33,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:22:33,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:22:33,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:22:33,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c92fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33, skipping insertion in model container [2022-01-11 02:22:33,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:22:33,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:22:33,551 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2022-01-11 02:22:33,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:22:33,565 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:22:33,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2022-01-11 02:22:33,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:22:33,585 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:22:33,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33 WrapperNode [2022-01-11 02:22:33,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:22:33,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:22:33,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:22:33,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:22:33,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,612 INFO L137 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2022-01-11 02:22:33,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:22:33,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:22:33,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:22:33,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:22:33,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:22:33,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:22:33,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:22:33,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:22:33,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:22:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:33,677 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) [2022-01-11 02:22:33,678 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 [2022-01-11 02:22:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:22:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:22:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:22:33,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:22:33,746 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:22:33,747 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:22:33,840 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:22:33,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:22:33,844 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 02:22:33,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:22:33 BoogieIcfgContainer [2022-01-11 02:22:33,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:22:33,846 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:22:33,846 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:22:33,847 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:22:33,849 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:22:33" (1/1) ... [2022-01-11 02:22:33,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:22:33 BasicIcfg [2022-01-11 02:22:33,890 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:22:33,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:22:33,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:22:33,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:22:33,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:22:33" (1/4) ... [2022-01-11 02:22:33,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@809f9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:22:33, skipping insertion in model container [2022-01-11 02:22:33,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:22:33" (2/4) ... [2022-01-11 02:22:33,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@809f9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:22:33, skipping insertion in model container [2022-01-11 02:22:33,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:22:33" (3/4) ... [2022-01-11 02:22:33,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@809f9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:22:33, skipping insertion in model container [2022-01-11 02:22:33,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:22:33" (4/4) ... [2022-01-11 02:22:33,895 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.iTransformedIcfg [2022-01-11 02:22:33,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:22:33,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-11 02:22:33,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:22:33,933 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 02:22:33,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-11 02:22:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 02:22:33,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:33,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:33,949 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1064975405, now seen corresponding path program 1 times [2022-01-11 02:22:33,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:33,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216089251] [2022-01-11 02:22:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:33,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:34,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216089251] [2022-01-11 02:22:34,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216089251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:22:34,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:22:34,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:22:34,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982030861] [2022-01-11 02:22:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:22:34,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:22:34,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:22:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:22:34,150 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:34,162 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2022-01-11 02:22:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:22:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-11 02:22:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:34,170 INFO L225 Difference]: With dead ends: 39 [2022-01-11 02:22:34,171 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 02:22:34,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:22:34,178 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:34,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:22:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 02:22:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 02:22:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-11 02:22:34,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 8 [2022-01-11 02:22:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-11 02:22:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-11 02:22:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:22:34,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:34,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:34,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:22:34,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -456124174, now seen corresponding path program 1 times [2022-01-11 02:22:34,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:34,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795423349] [2022-01-11 02:22:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:34,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:34,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111861773] [2022-01-11 02:22:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:34,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:34,231 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) [2022-01-11 02:22:34,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:22:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-11 02:22:34,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:34,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:22:34,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795423349] [2022-01-11 02:22:34,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:22:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111861773] [2022-01-11 02:22:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111861773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:22:34,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:22:34,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 02:22:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092709989] [2022-01-11 02:22:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:22:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 02:22:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 02:22:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:22:34,550 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:34,637 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-11 02:22:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:22:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-11 02:22:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:34,638 INFO L225 Difference]: With dead ends: 32 [2022-01-11 02:22:34,638 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 02:22:34,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:22:34,641 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:34,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:22:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 02:22:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-11 02:22:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-11 02:22:34,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-01-11 02:22:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:34,656 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-11 02:22:34,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-11 02:22:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:22:34,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:34,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:34,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 02:22:34,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:34,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash -222902643, now seen corresponding path program 1 times [2022-01-11 02:22:34,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144467400] [2022-01-11 02:22:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:34,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:34,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:34,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908231087] [2022-01-11 02:22:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:34,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:34,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:34,895 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) [2022-01-11 02:22:34,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:22:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-11 02:22:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:35,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:22:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:35,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:35,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144467400] [2022-01-11 02:22:35,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:22:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908231087] [2022-01-11 02:22:35,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908231087] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-11 02:22:35,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:22:35,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-01-11 02:22:35,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690968946] [2022-01-11 02:22:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:22:35,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:22:35,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:22:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:22:35,393 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:35,408 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-11 02:22:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 02:22:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 02:22:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:35,409 INFO L225 Difference]: With dead ends: 29 [2022-01-11 02:22:35,409 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 02:22:35,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:22:35,411 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:35,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-01-11 02:22:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 02:22:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-11 02:22:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-11 02:22:35,418 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2022-01-11 02:22:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:35,418 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-11 02:22:35,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-11 02:22:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:22:35,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:35,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:35,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:22:35,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-11 02:22:35,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1819570500, now seen corresponding path program 1 times [2022-01-11 02:22:35,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711406730] [2022-01-11 02:22:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:35,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:35,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:35,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329589557] [2022-01-11 02:22:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:35,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:35,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:35,656 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) [2022-01-11 02:22:35,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:22:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:35,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-11 02:22:35,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:35,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:22:35,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711406730] [2022-01-11 02:22:35,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:22:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329589557] [2022-01-11 02:22:35,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329589557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:22:35,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:22:35,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:22:35,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267121355] [2022-01-11 02:22:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:22:35,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:22:35,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:22:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:22:35,723 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:35,752 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-11 02:22:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:22:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-11 02:22:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:35,753 INFO L225 Difference]: With dead ends: 41 [2022-01-11 02:22:35,754 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 02:22:35,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:22:35,755 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:35,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:22:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 02:22:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 02:22:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-11 02:22:35,758 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2022-01-11 02:22:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:35,758 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-11 02:22:35,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-11 02:22:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:22:35,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:35,759 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:35,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:22:35,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:35,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1750723032, now seen corresponding path program 1 times [2022-01-11 02:22:35,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:35,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105523016] [2022-01-11 02:22:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:35,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:35,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:35,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690317010] [2022-01-11 02:22:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:35,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:35,986 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) [2022-01-11 02:22:35,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:22:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-11 02:22:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:36,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:22:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:36,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:36,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105523016] [2022-01-11 02:22:36,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:22:36,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690317010] [2022-01-11 02:22:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690317010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:22:36,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 02:22:36,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-01-11 02:22:36,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535273267] [2022-01-11 02:22:36,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 02:22:36,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:22:36,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:22:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:22:36,077 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:36,101 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-11 02:22:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:22:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 02:22:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:36,102 INFO L225 Difference]: With dead ends: 32 [2022-01-11 02:22:36,102 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 02:22:36,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:22:36,102 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:36,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:22:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 02:22:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-01-11 02:22:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-11 02:22:36,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-01-11 02:22:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:36,105 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-11 02:22:36,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-11 02:22:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 02:22:36,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:36,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:36,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:22:36,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:36,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1563495561, now seen corresponding path program 1 times [2022-01-11 02:22:36,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:36,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179141364] [2022-01-11 02:22:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:36,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:36,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:36,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058303246] [2022-01-11 02:22:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:36,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:36,322 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) [2022-01-11 02:22:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 02:22:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:22:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-11 02:22:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:36,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:22:49,577 WARN L860 $PredicateComparison]: unable to prove that (or (<= (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (not (<= |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int| |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|)) (forall ((|v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_11| Int)) (or (not (<= |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_11| |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|)) (= (mod (+ (mod (+ (mod (* 4294967295 |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_11|) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) 4294967296) (mod (* |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_11| (mod (+ (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int|) 4294967296) 1) 4294967296)) 4294967296)) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int|) (not (<= (div (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296) 2) |v_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int_11|))))) is different from true [2022-01-11 02:22:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-01-11 02:22:51,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:22:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179141364] [2022-01-11 02:22:51,798 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:22:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058303246] [2022-01-11 02:22:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058303246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:22:51,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 02:22:51,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-01-11 02:22:51,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171070441] [2022-01-11 02:22:51,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 02:22:51,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-11 02:22:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:22:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-11 02:22:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=112, Unknown=1, NotChecked=22, Total=182 [2022-01-11 02:22:51,800 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:22:57,078 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2022-01-11 02:22:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-11 02:22:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 02:22:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:22:57,079 INFO L225 Difference]: With dead ends: 80 [2022-01-11 02:22:57,079 INFO L226 Difference]: Without dead ends: 62 [2022-01-11 02:22:57,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=145, Invalid=364, Unknown=1, NotChecked=42, Total=552 [2022-01-11 02:22:57,080 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 02:22:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 104 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-01-11 02:22:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-11 02:22:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2022-01-11 02:22:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-01-11 02:22:57,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 16 [2022-01-11 02:22:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:22:57,084 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-01-11 02:22:57,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:22:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-01-11 02:22:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 02:22:57,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:22:57,085 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:22:57,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 02:22:57,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:57,299 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:22:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:22:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 288615054, now seen corresponding path program 2 times [2022-01-11 02:22:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:22:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461902928] [2022-01-11 02:22:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:22:57,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:22:57,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 02:22:57,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609506745] [2022-01-11 02:22:57,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:22:57,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:22:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:22:57,323 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) [2022-01-11 02:22:57,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 02:22:57,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:22:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:22:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-11 02:22:57,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:22:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:22:57,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:23:06,680 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296))) (let ((.cse1 (div .cse0 2))) (or (<= .cse0 |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (not (<= |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int| |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|)) (= |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int| (mod (+ (mod (* .cse1 (mod (+ (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int|) 4294967296) 1) 4294967296)) 4294967296) (mod (+ |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int| (mod (* 4294967295 .cse1) 4294967296)) 4294967296)) 4294967296)) (< |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int| .cse1)))) is different from true [2022-01-11 02:23:20,321 WARN L228 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-11 02:23:35,257 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~b~0#1Int|) 4294967296))) (let ((.cse2 (mod (* 2 .cse0) 4294967296))) (let ((.cse1 (div .cse2 2))) (or (not (<= .cse0 |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|)) (< |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int| .cse1) (<= .cse2 |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) (= (mod (+ (mod (* .cse1 (mod (+ (mod (* 2 |c_ULTIMATE.start_ULTIMATE.start_main_~q~0#1Int|) 4294967296) 1) 4294967296)) 4294967296) (mod (+ (mod (* .cse1 4294967295) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~r~0#1Int|) 4294967296)) 4294967296) |c_ULTIMATE.start_ULTIMATE.start_main_~A~0#1Int|))))) is different from true [2022-01-11 02:23:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-01-11 02:23:50,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:23:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461902928] [2022-01-11 02:23:50,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 02:23:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609506745] [2022-01-11 02:23:50,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609506745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:23:50,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 02:23:50,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-01-11 02:23:50,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457675963] [2022-01-11 02:23:50,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 02:23:50,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 02:23:50,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:23:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 02:23:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=152, Unknown=2, NotChecked=54, Total=272 [2022-01-11 02:23:50,179 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)