/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-patterns/array16_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:14:44,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:14:44,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:14:44,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:14:44,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:14:44,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:14:44,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:14:44,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:14:44,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:14:44,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:14:44,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:14:44,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:14:44,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:14:44,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:14:44,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:14:44,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:14:44,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:14:44,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:14:44,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:14:44,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:14:44,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:14:44,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:14:44,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:14:44,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:14:44,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:14:44,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:14:44,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:14:44,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:14:44,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:14:44,581 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:14:44,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:14:44,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:14:44,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:14:44,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:14:44,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:14:44,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:14:44,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:14:44,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:14:44,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:14:44,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:14:44,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:14:44,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:14:44,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:14:44,799 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:14:44,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array16_pattern.c [2022-01-09 23:14:44,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f79003f1/8a453ece0fa4407aa17c81a89e52aca4/FLAG82997bcd8 [2022-01-09 23:14:45,175 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:14:45,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array16_pattern.c [2022-01-09 23:14:45,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f79003f1/8a453ece0fa4407aa17c81a89e52aca4/FLAG82997bcd8 [2022-01-09 23:14:45,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f79003f1/8a453ece0fa4407aa17c81a89e52aca4 [2022-01-09 23:14:45,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:14:45,621 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:14:45,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:14:45,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:14:45,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:14:45,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be526d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45, skipping insertion in model container [2022-01-09 23:14:45,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:14:45,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:14:45,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array16_pattern.c[1311,1324] [2022-01-09 23:14:45,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:14:45,787 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:14:45,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array16_pattern.c[1311,1324] [2022-01-09 23:14:45,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:14:45,826 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:14:45,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45 WrapperNode [2022-01-09 23:14:45,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:14:45,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:14:45,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:14:45,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:14:45,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,876 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2022-01-09 23:14:45,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:14:45,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:14:45,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:14:45,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:14:45,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:14:45,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:14:45,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:14:45,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:14:45,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (1/1) ... [2022-01-09 23:14:45,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:14:45,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:45,953 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) [2022-01-09 23:14:45,971 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 [2022-01-09 23:14:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-09 23:14:45,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:14:45,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:14:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:14:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:14:46,041 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:14:46,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:14:46,171 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:14:46,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:14:46,175 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-09 23:14:46,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:14:46 BoogieIcfgContainer [2022-01-09 23:14:46,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:14:46,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:14:46,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:14:46,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:14:46,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:14:45" (1/3) ... [2022-01-09 23:14:46,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e840c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:14:46, skipping insertion in model container [2022-01-09 23:14:46,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:45" (2/3) ... [2022-01-09 23:14:46,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e840c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:14:46, skipping insertion in model container [2022-01-09 23:14:46,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:14:46" (3/3) ... [2022-01-09 23:14:46,183 INFO L111 eAbstractionObserver]: Analyzing ICFG array16_pattern.c [2022-01-09 23:14:46,186 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:14:46,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:14:46,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:14:46,238 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 [2022-01-09 23:14:46,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:14:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-09 23:14:46,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:46,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:46,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2022-01-09 23:14:46,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870724956] [2022-01-09 23:14:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:46,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:46,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-09 23:14:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:14:46,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870724956] [2022-01-09 23:14:46,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870724956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:46,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:46,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:14:46,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560303444] [2022-01-09 23:14:46,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:46,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:14:46,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:14:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:14:46,457 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 23:14:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:46,476 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2022-01-09 23:14:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:14:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-09 23:14:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:46,483 INFO L225 Difference]: With dead ends: 59 [2022-01-09 23:14:46,483 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 23:14:46,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:14:46,490 INFO L933 BasicCegarLoop]: 38 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, 38 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 [2022-01-09 23:14:46,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:14:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 23:14:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-09 23:14:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-01-09 23:14:46,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2022-01-09 23:14:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:46,522 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-01-09 23:14:46,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 23:14:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-01-09 23:14:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:14:46,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:46,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:14:46,524 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2022-01-09 23:14:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749611910] [2022-01-09 23:14:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:46,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:46,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527712200] [2022-01-09 23:14:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:46,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:46,568 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) [2022-01-09 23:14:46,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:14:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 23:14:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:46,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:14:46,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749611910] [2022-01-09 23:14:46,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:46,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527712200] [2022-01-09 23:14:46,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527712200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:46,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:46,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-09 23:14:46,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706550408] [2022-01-09 23:14:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:14:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:14:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:14:46,785 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:46,887 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-01-09 23:14:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:14:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-01-09 23:14:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:46,888 INFO L225 Difference]: With dead ends: 58 [2022-01-09 23:14:46,888 INFO L226 Difference]: Without dead ends: 39 [2022-01-09 23:14:46,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:46,889 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:46,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 52 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-09 23:14:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-01-09 23:14:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-09 23:14:46,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2022-01-09 23:14:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:46,909 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-09 23:14:46,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-09 23:14:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-09 23:14:46,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:46,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:47,119 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 [2022-01-09 23:14:47,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1984127527, now seen corresponding path program 1 times [2022-01-09 23:14:47,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608944150] [2022-01-09 23:14:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:47,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:47,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788792568] [2022-01-09 23:14:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:47,133 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) [2022-01-09 23:14:47,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:14:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:14:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:14:47,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:14:47,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608944150] [2022-01-09 23:14:47,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788792568] [2022-01-09 23:14:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788792568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:47,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:47,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:14:47,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917133672] [2022-01-09 23:14:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:47,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:14:47,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:14:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:14:47,236 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:47,270 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-01-09 23:14:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:14:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-01-09 23:14:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:47,271 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:14:47,271 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 23:14:47,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:14:47,272 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:47,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 47 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:14:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 23:14:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-01-09 23:14:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-09 23:14:47,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2022-01-09 23:14:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-09 23:14:47,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-09 23:14:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-09 23:14:47,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:47,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:47,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-09 23:14:47,492 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 [2022-01-09 23:14:47,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2022-01-09 23:14:47,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:47,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106550261] [2022-01-09 23:14:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:47,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:47,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987371261] [2022-01-09 23:14:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:47,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:47,512 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) [2022-01-09 23:14:47,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:14:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-09 23:14:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:47,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:14:48,098 INFO L353 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-01-09 23:14:48,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2022-01-09 23:14:48,306 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-09 23:14:48,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-09 23:14:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:48,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106550261] [2022-01-09 23:14:48,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987371261] [2022-01-09 23:14:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987371261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:14:48,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:14:48,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-01-09 23:14:48,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822777980] [2022-01-09 23:14:48,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:14:48,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:14:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:14:48,619 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:48,964 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2022-01-09 23:14:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:14:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2022-01-09 23:14:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:48,969 INFO L225 Difference]: With dead ends: 104 [2022-01-09 23:14:48,969 INFO L226 Difference]: Without dead ends: 81 [2022-01-09 23:14:48,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:14:48,974 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:48,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 168 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 193 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-01-09 23:14:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-09 23:14:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2022-01-09 23:14:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 23:14:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-01-09 23:14:48,995 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 38 [2022-01-09 23:14:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:48,995 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-01-09 23:14:48,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-01-09 23:14:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 23:14:48,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:48,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:49,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:49,229 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 [2022-01-09 23:14:49,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 572224539, now seen corresponding path program 2 times [2022-01-09 23:14:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672255626] [2022-01-09 23:14:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:49,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:49,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:49,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046124496] [2022-01-09 23:14:49,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:14:49,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:49,240 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) [2022-01-09 23:14:49,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:14:49,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:14:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:14:49,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672255626] [2022-01-09 23:14:49,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046124496] [2022-01-09 23:14:49,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046124496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:49,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:49,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:49,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729508652] [2022-01-09 23:14:49,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:49,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:49,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:49,447 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:49,565 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2022-01-09 23:14:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:14:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-01-09 23:14:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:49,566 INFO L225 Difference]: With dead ends: 143 [2022-01-09 23:14:49,566 INFO L226 Difference]: Without dead ends: 117 [2022-01-09 23:14:49,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:14:49,567 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 108 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:49,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 118 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-09 23:14:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2022-01-09 23:14:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:14:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2022-01-09 23:14:49,577 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 40 [2022-01-09 23:14:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2022-01-09 23:14:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2022-01-09 23:14:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 23:14:49,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:49,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:49,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:49,794 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 [2022-01-09 23:14:49,794 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 3 times [2022-01-09 23:14:49,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:49,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012601562] [2022-01-09 23:14:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:49,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:49,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236335088] [2022-01-09 23:14:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:14:49,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:49,816 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) [2022-01-09 23:14:49,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:14:49,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:14:49,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 23:14:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:50,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:14:50,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:14:50,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-09 23:14:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:14:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:50,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-01-09 23:14:50,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-01-09 23:14:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-09 23:14:51,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012601562] [2022-01-09 23:14:51,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236335088] [2022-01-09 23:14:51,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236335088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:51,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:51,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2022-01-09 23:14:51,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24028979] [2022-01-09 23:14:51,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:14:51,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:14:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:14:51,300 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 31 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 23:14:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:51,880 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-01-09 23:14:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-09 23:14:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-01-09 23:14:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:51,881 INFO L225 Difference]: With dead ends: 142 [2022-01-09 23:14:51,881 INFO L226 Difference]: Without dead ends: 138 [2022-01-09 23:14:51,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:14:51,882 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:51,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 193 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 195 Invalid, 0 Unknown, 222 Unchecked, 0.1s Time] [2022-01-09 23:14:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-09 23:14:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2022-01-09 23:14:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:14:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-01-09 23:14:51,894 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 40 [2022-01-09 23:14:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:51,894 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-01-09 23:14:51,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 23:14:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-01-09 23:14:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 23:14:51,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:51,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:51,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:52,111 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 [2022-01-09 23:14:52,112 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -878767623, now seen corresponding path program 1 times [2022-01-09 23:14:52,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71268056] [2022-01-09 23:14:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:52,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:52,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039772609] [2022-01-09 23:14:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:52,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:52,124 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) [2022-01-09 23:14:52,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:14:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:52,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:14:52,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:14:52,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71268056] [2022-01-09 23:14:52,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039772609] [2022-01-09 23:14:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039772609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:52,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-09 23:14:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968573551] [2022-01-09 23:14:52,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:52,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:14:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:14:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:14:52,312 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:52,438 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2022-01-09 23:14:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:14:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-01-09 23:14:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:52,439 INFO L225 Difference]: With dead ends: 176 [2022-01-09 23:14:52,439 INFO L226 Difference]: Without dead ends: 135 [2022-01-09 23:14:52,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:14:52,440 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:52,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-09 23:14:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2022-01-09 23:14:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:14:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-01-09 23:14:52,450 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 40 [2022-01-09 23:14:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:52,450 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-01-09 23:14:52,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-01-09 23:14:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-09 23:14:52,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:52,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:52,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:52,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:52,667 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1026220572, now seen corresponding path program 4 times [2022-01-09 23:14:52,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:52,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431410217] [2022-01-09 23:14:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:52,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:52,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:52,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011310746] [2022-01-09 23:14:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:14:52,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:52,677 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) [2022-01-09 23:14:52,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:14:52,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:14:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:14:52,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:14:52,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431410217] [2022-01-09 23:14:52,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011310746] [2022-01-09 23:14:52,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011310746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:52,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:52,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:52,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858948310] [2022-01-09 23:14:52,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:52,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:52,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:52,899 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:53,023 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2022-01-09 23:14:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-09 23:14:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-01-09 23:14:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:53,024 INFO L225 Difference]: With dead ends: 144 [2022-01-09 23:14:53,024 INFO L226 Difference]: Without dead ends: 128 [2022-01-09 23:14:53,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-09 23:14:53,025 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:53,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 105 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-09 23:14:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-01-09 23:14:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:14:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2022-01-09 23:14:53,033 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 43 [2022-01-09 23:14:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:53,033 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2022-01-09 23:14:53,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2022-01-09 23:14:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 23:14:53,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:53,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:53,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:53,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:53,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 768574145, now seen corresponding path program 2 times [2022-01-09 23:14:53,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734614635] [2022-01-09 23:14:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:53,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:53,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501188938] [2022-01-09 23:14:53,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:14:53,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:53,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:53,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:14:53,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:14:53,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:14:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:14:53,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:14:53,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734614635] [2022-01-09 23:14:53,461 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501188938] [2022-01-09 23:14:53,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501188938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:53,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:53,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:53,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131558705] [2022-01-09 23:14:53,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:53,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:53,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:53,463 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:53,564 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-01-09 23:14:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 23:14:53,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-01-09 23:14:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:53,565 INFO L225 Difference]: With dead ends: 150 [2022-01-09 23:14:53,565 INFO L226 Difference]: Without dead ends: 111 [2022-01-09 23:14:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:14:53,566 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:53,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 90 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-09 23:14:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2022-01-09 23:14:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.146341463414634) internal successors, (94), 82 states have internal predecessors, (94), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:14:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-01-09 23:14:53,574 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 45 [2022-01-09 23:14:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-01-09 23:14:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-01-09 23:14:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-09 23:14:53,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:53,575 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:53,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-09 23:14:53,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-09 23:14:53,792 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 799186529, now seen corresponding path program 1 times [2022-01-09 23:14:53,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:53,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051595226] [2022-01-09 23:14:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:53,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:53,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31922903] [2022-01-09 23:14:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:53,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:53,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:14:53,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:14:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-09 23:14:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:14:54,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-09 23:14:54,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051595226] [2022-01-09 23:14:54,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31922903] [2022-01-09 23:14:54,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31922903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:54,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:54,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-09 23:14:54,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282445974] [2022-01-09 23:14:54,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:54,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 23:14:54,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 23:14:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-09 23:14:54,293 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-09 23:14:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:54,494 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2022-01-09 23:14:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-09 23:14:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-01-09 23:14:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:54,495 INFO L225 Difference]: With dead ends: 119 [2022-01-09 23:14:54,496 INFO L226 Difference]: Without dead ends: 61 [2022-01-09 23:14:54,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:14:54,497 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:54,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 134 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-09 23:14:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2022-01-09 23:14:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-01-09 23:14:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-01-09 23:14:54,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 52 [2022-01-09 23:14:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:54,501 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-01-09 23:14:54,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-09 23:14:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-01-09 23:14:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:14:54,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:54,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:54,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:54,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:14:54,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 5 times [2022-01-09 23:14:54,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277285809] [2022-01-09 23:14:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:54,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:54,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:54,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340445119] [2022-01-09 23:14:54,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:14:54,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:54,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:54,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:14:54,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:14:54,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-09 23:14:54,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-09 23:14:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:54,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:14:54,991 INFO L353 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-01-09 23:14:54,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2022-01-09 23:14:55,169 INFO L353 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2022-01-09 23:14:55,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2022-01-09 23:14:55,270 INFO L353 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-01-09 23:14:55,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-01-09 23:15:04,732 INFO L353 Elim1Store]: treesize reduction 196, result has 32.4 percent of original size [2022-01-09 23:15:04,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 122 [2022-01-09 23:15:28,096 INFO L353 Elim1Store]: treesize reduction 165, result has 31.5 percent of original size [2022-01-09 23:15:28,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 146 treesize of output 152 [2022-01-09 23:15:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:15:28,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:31,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (v_ArrVal_161 Int) (|v_ULTIMATE.start_main_~column~0#1_67| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (not (<= v_ArrVal_161 |c_ULTIMATE.start_main_#t~ite10#1|)) (<= (let ((.cse1 (* c_~ARR_SIZE~0 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* |ULTIMATE.start_main_~index1~0#1| .cse1) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) v_ArrVal_161))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1)) (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ (* |v_ULTIMATE.start_main_~column~0#1_67| 4) |c_ULTIMATE.start_main_~#array~0#1.offset|))))) (* c_~ARR_SIZE~0 2)) (not (< |v_ULTIMATE.start_main_~column~0#1_67| c_~ARR_SIZE~0)) (< (+ |v_ULTIMATE.start_main_~column~0#1_67| 1) c_~ARR_SIZE~0))) is different from false [2022-01-09 23:15:33,719 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (v_ArrVal_161 Int) (|v_ULTIMATE.start_main_~column~0#1_67| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (<= (let ((.cse1 (* c_~ARR_SIZE~0 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* |ULTIMATE.start_main_~index1~0#1| .cse1) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) v_ArrVal_161))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1)) (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ (* |v_ULTIMATE.start_main_~column~0#1_67| 4) |c_ULTIMATE.start_main_~#array~0#1.offset|))))) (* c_~ARR_SIZE~0 2)) (not (< |v_ULTIMATE.start_main_~column~0#1_67| c_~ARR_SIZE~0)) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) v_ArrVal_161) (< (+ |v_ULTIMATE.start_main_~column~0#1_67| 1) c_~ARR_SIZE~0))) is different from false [2022-01-09 23:15:33,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:33,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277285809] [2022-01-09 23:15:33,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:33,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340445119] [2022-01-09 23:15:33,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340445119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:15:33,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:15:33,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-01-09 23:15:33,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441447428] [2022-01-09 23:15:33,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:33,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-09 23:15:33,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-09 23:15:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1486, Unknown=14, NotChecked=162, Total=1892 [2022-01-09 23:15:33,780 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:37,874 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2022-01-09 23:15:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-09 23:15:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-01-09 23:15:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:37,875 INFO L225 Difference]: With dead ends: 129 [2022-01-09 23:15:37,875 INFO L226 Difference]: Without dead ends: 125 [2022-01-09 23:15:37,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=278, Invalid=1877, Unknown=15, NotChecked=182, Total=2352 [2022-01-09 23:15:37,877 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:37,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 208 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 227 Invalid, 0 Unknown, 365 Unchecked, 0.2s Time] [2022-01-09 23:15:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-09 23:15:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2022-01-09 23:15:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 23:15:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2022-01-09 23:15:37,889 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 56 [2022-01-09 23:15:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:37,889 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2022-01-09 23:15:37,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2022-01-09 23:15:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:15:37,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:37,890 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:37,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:38,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:15:38,095 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 3 times [2022-01-09 23:15:38,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:38,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882782201] [2022-01-09 23:15:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:38,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:38,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:38,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928237630] [2022-01-09 23:15:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:15:38,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:38,116 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:15:38,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-09 23:15:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:15:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:15:38,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-09 23:15:38,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:38,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882782201] [2022-01-09 23:15:38,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:38,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928237630] [2022-01-09 23:15:38,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928237630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:38,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:38,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2022-01-09 23:15:38,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110759404] [2022-01-09 23:15:38,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:38,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 23:15:38,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 23:15:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:15:38,888 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-09 23:15:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:39,205 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2022-01-09 23:15:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:15:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2022-01-09 23:15:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:39,206 INFO L225 Difference]: With dead ends: 150 [2022-01-09 23:15:39,206 INFO L226 Difference]: Without dead ends: 137 [2022-01-09 23:15:39,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:15:39,207 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 90 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:39,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 124 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-09 23:15:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-01-09 23:15:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.173913043478261) internal successors, (135), 115 states have internal predecessors, (135), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:15:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-09 23:15:39,220 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 56 [2022-01-09 23:15:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:39,220 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-09 23:15:39,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 16 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-09 23:15:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-09 23:15:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-09 23:15:39,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:39,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:39,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-09 23:15:39,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:15:39,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash -70154694, now seen corresponding path program 6 times [2022-01-09 23:15:39,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:39,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382538592] [2022-01-09 23:15:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:39,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:39,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:39,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066361676] [2022-01-09 23:15:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:15:39,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:39,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:39,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:39,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:15:39,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-09 23:15:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:15:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:15:39,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382538592] [2022-01-09 23:15:39,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066361676] [2022-01-09 23:15:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066361676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:39,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:39,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-09 23:15:39,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110817850] [2022-01-09 23:15:39,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:39,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:15:39,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:15:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:15:39,754 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:15:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:40,085 INFO L93 Difference]: Finished difference Result 299 states and 346 transitions. [2022-01-09 23:15:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:15:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-01-09 23:15:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:40,087 INFO L225 Difference]: With dead ends: 299 [2022-01-09 23:15:40,087 INFO L226 Difference]: Without dead ends: 203 [2022-01-09 23:15:40,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:15:40,088 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:40,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 123 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:15:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-09 23:15:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2022-01-09 23:15:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 147 states have (on average 1.1700680272108843) internal successors, (172), 147 states have internal predecessors, (172), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:15:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2022-01-09 23:15:40,122 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 58 [2022-01-09 23:15:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:40,123 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2022-01-09 23:15:40,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:15:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2022-01-09 23:15:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-09 23:15:40,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:40,123 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:40,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:40,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:15:40,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1538493247, now seen corresponding path program 7 times [2022-01-09 23:15:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553561606] [2022-01-09 23:15:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:40,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:40,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879972203] [2022-01-09 23:15:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:15:40,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:40,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:40,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:15:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:15:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-09 23:15:40,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 23:15:40,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553561606] [2022-01-09 23:15:40,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879972203] [2022-01-09 23:15:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879972203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:40,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 23:15:40,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465620425] [2022-01-09 23:15:40,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:40,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:15:40,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:15:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:15:40,668 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:40,893 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-01-09 23:15:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-09 23:15:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2022-01-09 23:15:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:40,895 INFO L225 Difference]: With dead ends: 302 [2022-01-09 23:15:40,895 INFO L226 Difference]: Without dead ends: 232 [2022-01-09 23:15:40,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:15:40,897 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:40,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-09 23:15:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 200. [2022-01-09 23:15:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 181 states have (on average 1.1546961325966851) internal successors, (209), 181 states have internal predecessors, (209), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 23:15:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 227 transitions. [2022-01-09 23:15:40,914 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 227 transitions. Word has length 63 [2022-01-09 23:15:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:40,915 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 227 transitions. [2022-01-09 23:15:40,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 227 transitions. [2022-01-09 23:15:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-09 23:15:40,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:40,917 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:40,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-09 23:15:41,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 23:15:41,133 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash 751786592, now seen corresponding path program 8 times [2022-01-09 23:15:41,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754269433] [2022-01-09 23:15:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:41,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:41,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104044114] [2022-01-09 23:15:41,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:15:41,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:41,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:41,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:41,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 23:15:41,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:15:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:41,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-09 23:15:41,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-09 23:15:41,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754269433] [2022-01-09 23:15:41,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104044114] [2022-01-09 23:15:41,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104044114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:41,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 23:15:41,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457754633] [2022-01-09 23:15:41,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:41,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:15:41,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:15:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:15:41,427 INFO L87 Difference]: Start difference. First operand 200 states and 227 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:41,590 INFO L93 Difference]: Finished difference Result 327 states and 364 transitions. [2022-01-09 23:15:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:15:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-01-09 23:15:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:41,591 INFO L225 Difference]: With dead ends: 327 [2022-01-09 23:15:41,591 INFO L226 Difference]: Without dead ends: 196 [2022-01-09 23:15:41,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:15:41,593 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:41,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 129 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-09 23:15:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 136. [2022-01-09 23:15:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 121 states have internal predecessors, (134), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:15:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-01-09 23:15:41,606 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 65 [2022-01-09 23:15:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-01-09 23:15:41,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-01-09 23:15:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-09 23:15:41,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:41,609 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:41,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:41,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:41,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1335153970, now seen corresponding path program 1 times [2022-01-09 23:15:41,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:41,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108667726] [2022-01-09 23:15:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:41,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:41,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935817005] [2022-01-09 23:15:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:41,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:41,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:41,833 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:41,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 23:15:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:15:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 78 conjunts are in the unsatisfiable core [2022-01-09 23:15:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:42,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:15:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-01-09 23:15:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:15:42,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-09 23:15:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:15:42,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-01-09 23:15:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:15:43,011 INFO L353 Elim1Store]: treesize reduction 139, result has 40.3 percent of original size [2022-01-09 23:15:43,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 128 [2022-01-09 23:15:43,202 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,258 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,311 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,378 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:43,860 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,156 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,192 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,288 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,819 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,857 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,903 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:44,974 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,375 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,408 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,468 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,751 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,777 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:45,925 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:46,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:46,454 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:46,492 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:46,550 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:46,981 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:47,014 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:47,057 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:47,334 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:47,367 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:47,519 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,131 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,363 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,388 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,438 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,556 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,600 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,778 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,860 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:49,952 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,035 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,621 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,644 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,688 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,868 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:50,924 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:51,151 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:52,927 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,145 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,173 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,222 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,350 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,391 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,564 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,637 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,727 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:53,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:54,341 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:54,372 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:54,442 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:54,658 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:54,709 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:55,125 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,171 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,496 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,527 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,592 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,763 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:57,818 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,110 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,239 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,355 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,436 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,965 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:58,995 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:59,060 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:59,293 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:59,346 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 23:15:59,638 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful